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- Agriculture, Aquaculture & Food Sciences
- Animals & Veterinary Medicine
- Animals: A Visual Encyclopedia
- Barron's Encyclopedia of Cat Breeds
- Barron's Encyclopedia of Dog Breeds
- The Bees in Your Backyard: A Guide to North America's Bees
- Black's Veterinary Dictionary
- Bumble Bees of North America: An Identification Guide
- The Chicken: A Natural History
- DK Eyewitness Books: Bird
- DK Eyewitness Books: Cat
- DK Eyewitness Books: Dinosaur
- DK Eyewitness Books: Dog
- DK Eyewitness Books: Endangered Animals
- DK Eyewitness Books: Fish
- DK Eyewitness Books: Horse
- DK Eyewitness Books: Mammal
- DK Eyewitness Books: Prehistoric Life
- DK Eyewitness Books: Reptiles
- DK Eyewitness Books: Shark
- DK Eyewitness Books: Whale
- Dinosaur Atlas: An Amazing Journey Through a Lost World
- Edinburgh Companions to Literature and the Humanities: The Edinburgh Companion to Animal Studies
- Encyclopedia of Dinosaurs
- Facts at Your Fingertips: World of Endangered Animals: Africa
- Facts at Your Fingertips: World of Endangered Animals: Australia and Southeast Asia
- Facts at Your Fingertips: World of Endangered Animals: Europe
- Facts at Your Fingertips: World of Endangered Animals: North and South America
- Facts at Your Fingertips: World of Endangered Animals: South and Central Asia
- Firefly Encyclopedia of Reptiles and Amphibians
- Fishes: A Guide to Their Diversity
- Guide to the Manta and Devil Rays of the World
- Handy Answer: The Handy Dinosaur Answer Book
- The Horse: A Natural History
- Introduction to Animal and Veterinary Anatomy and Physiology
- A Pocket Guide to Sharks of the World
- Princeton Encyclopedia of Birds
- Princeton Encyclopedia of Mammals
- Princeton Field Guides: Canids of the World: Wolves, Wild Dogs, Foxes, Jackals, Coyotes, and Their Relatives
- Princeton Field Guides: Field Guide to the Fishes of the Amazon, Orinoco, and Guianas
- Princeton Field Guides: The Princeton Field Guide to Dinosaurs
- A Swift Guide to Butterflies of Mexico and Central America
- A Swift Guide to Butterflies of North America
- Ten Thousand Birds
- Walker's Mammals of the World: Monotremes, Marsupials, Afrotherians, Xenarthrans, and Sundatherians
- The Young Birders Guide to Birds of North America
- Arts & Leisure
- Arts & Leisure - Art & Art History
- Arts & Leisure - Fashion
- Arts & Leisure - Film & Television
- Arts & Leisure - Music
- Arts & Leisure - Performing Arts
- Arts & Leisure - Photography & Digital Arts
- Arts & Leisure - Sports
- Biography
- Business, Finance & Economics - Business
- Business, Finance & Economics - Economics
- Business, Finance & Economics - Finance, Personal
- Business, Finance & Economics - Management
- Business, Finance & Economics - Marketing
- Business, Finance & Economics - Tourism & Hospitality
- Food, Drink, Nutrition
- General Reference
- General Reference - Bilingual Dictionaries
- General Reference - Dictionaries & Thesauri
- General Reference - General Encyclopedias
- Geography
- Health & Medicine
- Health & Medicine - Dentistry
- Health & Medicine - Exercise
- Health & Medicine - Health
- Health & Medicine - Medicine
- Health & Medicine - Nursing
- Health & Medicine - Rehabilitation & Therapy
- History - Archaeology & Paleontology
- History - Europe -- History
- History - Great Britain -- History
- History - History, Ancient
- History - United States -- History
- The 100 Greatest Americans of the 20th Century: A Social Justice Hall of Fame
- The African American Experience: From Slavery to the Presidency
- American Biographies: American Political Leaders
- American Biographies: American Social Leaders and Activists
- American Constitutional Law: The Bill of Rights and Subsequent Amendments
- American Constitutional Law: The Structure of Government
- American Governance
- American Presidents Ranked by Performance, 1789-2012
- American Social and Political Movements of the 20th Century: Rethinking the American Antinuclear Movement
- American Social and Political Movements of the 20th Century: Rethinking the American Labor Movement
- Americas Favorite Holidays: Candid Histories
- The Atlas of California
- Atlas of Indian Nations
- The Bloomsbury Encyclopedia of the American Enlightenment
- Civil War Biographies from the Western Waters: 956 Confederate and Union Naval and Military Personnel, Contractors, Politicians, Officials, Steamboat Pilots and Others
- A Companion to First Ladies
- The Constitution Explained: A Guide for Every American
- Constitutional Amendments
- Culture Wars in America: An Encyclopedia of Issues, Viewpoints, and Voices
- DK Eyewitness Books: Cowboy
- DK Eyewitness Books: North American Indian
- Encyclopedia of American Cultural and Intellectual History
- Encyclopedia of American Foreign Policy
- Encyclopedia of American Government and Civics
- Encyclopedia of American Political Parties and Elections
- Encyclopedia of American Studies
- Encyclopedia of Cuban-United States Relations
- Encyclopedia of Free Blacks and People of Color in the Americas
- Encyclopedia of North American Immigration
- The Encyclopedia of Strikes in American History
- The Encyclopedia of The Continental Congresses
- Encyclopedia of the Alamo and the Texas Revolution
- Encyclopedia of the American Indian in the Twentieth Century
- Encyclopedia of the United States Cabinet
- Encyclopedia of the United States in the Nineteenth Century
- Every Day of the Civil War: A Chronological Encyclopedia
- A Financial History of Modern U.S. Corporate Scandals from Enron to Reform
- First Ladies of the United States
- From Suffrage to the Senate: America's Political Women
- Gale Encyclopedia of Multicultural America
- The Great American History Fact-Finder
- The Handy American Government Answer Book
- The Handy Answer Book Series: The Handy African American History Answer Book
- Handy Answer: The Handy American History Answer Book
- Handy Answer: The Handy Presidents Answer Book
- Handy Answer: The Handy State-by-State Answer Book
- The Handy Armed Forces Answer Book: Your Guide to the Whats and Whys of the U.S. Military
- Icons of American Popular Culture: From P.T. Barnum to Jennifer Lopez
- Jews and the Civil War: A Reader
- Milestone Documents in African American History
- Milestone Documents in American History: Exploring the Primary Sources That Shaped America
- Milestone Documents of American Leaders
- Milestone Visual Documents in American History: The Images, Cartoons, and Other Visual Sources that Shaped America
- Modern American Lives: Individuals and Issues in American History Since 1945
- Native American Landmarks and Festivals
- New Americans: A Guide to Immigration Since 1965
- The New Big Book of U.S. Presidents: Fascinating Facts about Each and Every President, Including an American History Timeline
- The New Encyclopedia of the American West
- The Oxford Encyclopedia of American Military and Diplomatic History
- The Oxford Encyclopedia of the History of American Science, Medicine, and Technology
- Political Assassins, Terrorists and Related Conspiracies in American History
- Political Corruption in America: An Encyclopedia of Scandals, Power & Greed
- The Princeton Encyclopedia of American Political History
- The Reader's Companion to American History
- Ripples of Hope: Great American Civil Rights Speeches
- Rourke's Complete History of Our Presidents Encyclopedia
- Routledge Histories: The Routledge History of Gender, War, and the U.S. Military
- Routledge Histories: The Routledge History of the American South
- The Schlager Anthology of Black America: A Student's Guide to Essential Primary Sources
- The Schlager Anthology of Early America: A Student's Guide to Essential Primary Sources
- The Schlager Anthology of Westward Expansion: A Student's Guide to Essential Primary Sources
- The Schlager Anthology of the American Revolution: A Student's Guide to Essential Primary Sources
- The Schlager Anthology of the Gilded Age and Progressive Era: A Student's Guide to Essential Primary Sources
- This Day in American History
- This is Who We Were: This is Who We Were: In the 2010s
- Timelines in American History: American Women's History Timeline
- Timelines in American History: Civil Rights in America Timeline
- Timelines in American History: Poverty in America Timeline
- Timelines in American History: Religion in America Timeline
- Timelines in American History: Slavery in America Timeline
- Timelines in American History: Suffrage in America Timeline
- Timelines in American History: The 21st Century Timeline
- Timelines in American History: The Civil War and Reconstruction Timeline
- Timelines in American History: The Colonial Era Timeline
- Timelines in American History: The Eighties Timeline
- Timelines in American History: The Fifties Timeline
- Timelines in American History: The Gilded Age Timeline
- Timelines in American History: The Seventies Timeline
- Timelines in American History: The Sixties Timeline
- Timelines in American History: Working in America Timeline
- Trailblazing Women!: Amazing Americans Who Made History
- U.S. Constitution and You
- The Underground Railroad: An Encyclopedia of People, Places, and Operations
- Votes of Confidence: A Young Person's Guide to American Elections
- Working Americans: Working Americans 1880-2017: Immigrants
- Working Americans: Working Americans 1880-2018: Politics & Politicians
- Working Americans: Working Americans 1898-2016: African Americans
- Working Americans: Working Americans, 1798-2020: Farming & Ranching
- Working Americans: Working Americans, 1900-2021: Teens in America
- A to Z of Women: American Women Leaders and Activists
- History - World history
- Africa's Peacemakers
- Africa: War and Conflict in the Twentieth Century
- African Dominion: A New History of Empire in Early and Medieval West Africa
- The Age of Revolution
- Andromeda Encyclopedic Dictionary of World History
- The Ardennes Battlefield
- The Ashgate Research Companion to the Korean War
- Assassinations: The Plots, Politics, and Powers behind History-changing Murders
- An Atlas and Survey of Latin American History
- The Basics: Magic: The Basics
- Biographical Dictionary of Modern Egypt
- A Brief History of Afghanistan
- A Brief History of Australia
- A Brief History of Brazil
- A Brief History of Canada
- A Brief History of Central America
- A Brief History of Egypt
- A Brief History of France
- A Brief History of Germany
- A Brief History of Great Britain
- A Brief History of India
- A Brief History of Iraq
- A Brief History of Ireland
- A Brief History of Israel
- A Brief History of Korea
- A Brief History of Mexico
- A Brief History of Russia
- A Brief History of Saudi Arabia
- Chambers Dictionary of World History
- The Christmas Encyclopedia
- Cold War: An International History
- The Colonial and Postcolonial Experience
- Concise Atlas of World History, Andromeda
- A Concise History of the Middle East
- Conspiracies and Secret Societies
- DK Eyewitness Books: Battle
- DK Eyewitness Books: Castle
- DK Eyewitness Books: Knight
- DK Eyewitness Books: Medieval Life
- DK Eyewitness Books: Pirate
- DK Eyewitness Books: Soldier
- DK Eyewitness Books: Titanic
- A Dictionary of Contemporary History - 1945 to the present
- Edinburgh Companions to Literature and the Humanities: The Edinburgh Companion to the Postcolonial Middle East
- The Encyclopaedia of the Renaissance
- Encyclopedia of African History
- Encyclopedia of Chinese-American Relations
- The Encyclopedia of Conspiracies and Conspiracy Theories
- Encyclopedia of Emancipation and Abolition in the Transatlantic World
- Encyclopedia of Empire
- Encyclopedia of Historical Treaties and Alliances
- The Encyclopedia of Invasions & Conquests
- Encyclopedia of Mexico: History, Society & Culture
- Encyclopedia of Society and Culture in the Medieval World
- Encyclopedia of South Africa
- Encyclopedia of Warrior Peoples & Fighting Groups
- The Encyclopedia of World History
- Encyclopedia of the Palestinians
- Encyclopedia of the Romantic Era, 1760-1850
- Handy Answer: Native American Almanac: More Than 50,000 Years of the Cultures and Histories of Indigenous Peoples
- Historic Documents of 2017
- Historic Documents of 2018
- Historic Documents of 2019
- Historical Dictionary of Australia
- Historical Dictionary of Russian and Soviet Intelligence
- The History of Canada
- The Hutchinson Chronology of World History
- Latin American History and Culture: Encyclopedia of Colonial Latin America (1550s to 1820s)
- Latin American History and Culture: Encyclopedia of Early Modern Latin America (1820s to 1900)
- Latin American History and Culture: Encyclopedia of Modern Latin America (1900 to the Present)
- Latin American History and Culture: Encyclopedia of Pre-Colonial Latin America (Prehistory to 1550s)
- The Macquarie Encyclopedia of Australian Events
- National Geographic Almanac of World History
- The Normandy Battlefields
- Opinions Throughout History: Diseases & Epidemics
- Opinions Throughout History: Globalization
- Opinions Throughout History: War & the Military
- Places of Encounter: Time, Place, and Connectivity in World History, Volume Two: Since 1500
- Places of Encounter: Time, Place, and Connectivity in World History: To 1600
- Political Handbook of the World 2018-2019
- The Reader's Companion to Military History
- Reference Guide to the Major Wars and Conflicts in History: Wars in the Age of Revolution and Empire (1750 to 1900)
- Reference Guide to the Major Wars and Conflicts in History: Wars in the Contemporary World (1950 to Present)
- Reference Guide to the Major Wars and Conflicts in History: Wars in the Early 20th Century (1900 to 1950)
- Reference Guide to the Major Wars and Conflicts in History: Wars in the First Global Age (1450 to 1750)
- Reference Guide to the Major Wars and Conflicts in History: Wars in the Medieval World (600 to 1450)
- Repeating and Multi-Fire Weapons: A History from the Zhuge Crossbow Through the AK-47
- Routledge Histories: The Routledge History of Medieval Magic
- Routledge Histories: The Routledge History of World Peace Since 1750
- Routledge Histories: The Routledge History of the Renaissance
- Samurai Battles
- Samurai Swords
- Samurai: An Illustrated History
- The Sniper Encyclopaedia
- Societies and Cultures: Russia
- An Uncommon History of Common Things
- World Heritage Sites: Tourism, Local Communities and Conservation Activities
- World History: A Comprehensive Reference Set
- World Royal Families
- The World's Heritage
- Jobs & Careers
- Language & Literature - American literature
- Language & Literature - British literature
- Language & Literature - Composition (Language arts)
- Language & Literature - Linguistics
- Language & Literature - Literature
- Language & Literature - Modern Languages
- Language & Literature - Quotations
- Leadership
- Mathematics & Statistics - Mathematics
- Mathematics & Statistics - Statistics
- Mythology & Folklore
- Alien Mysteries, Conspiracies and Cover-Ups
- Bloomsbury Dictionary of Myth
- Chambers Dictionary of the Unexplained
- Demons, the Devil, and Fallen Angels
- Dictionary of Classical Mythology
- Encyclopedia of Mythological Objects
- Hidden Realms, Lost Civilizations, and Beings from Other Worlds
- Myths and Legends of the Celts
- Real Ghosts, Restless Spirits, and Haunted Places
- Unexplained! Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena
- The Vampire Almanac: The Complete History
- The Vampire Book: The Encyclopedia of the Undead
- The Werewolf Book: The Encyclopedia of Shape-Shifting Beings
- Who's Who in Classical Mythology, Routledge
- Philosophy
- Psychology
- Religion & Theology
- Religion & Theology - Buddhism
- Religion & Theology - Christianity
- Religion & Theology - Hinduism
- Religion & Theology - Islam
- Religion & Theology - Judaism
- Science
- Science - Astronomy
- Science - Biology
- Science - Botany
- Science - Chemistry
- Science - Energy Science
- Science - Environmental sciences
- Science - Geology
- Science - Marine sciences
- Science - Physics
- Science - Scientists
- Social Sciences
- Social Sciences - Anthropology
- Social Sciences - College Preparation
- Social Sciences - Contemporary Issues & Controversies
- AllSides Red Blue Dictionary
- The Conversation: An Independent Source of Analysis from Academic Researchers
- Cyberspies: Inside the World of Hacking, Online Privacy, and Cyberterrorism
- Exposing Hate: Prejudice, Hatred, and Violence in Action
- Forcibly Displaced: Toward a Development Approach Supporting Refugees, the Internally Displaced, and Their Hosts
- Issues & Controversies: Overviews and Pro/Con Arguments
- Landmark Supreme Court Cases: Abortion
- Landmark Supreme Court Cases: Freedom of Religion
- Landmark Supreme Court Cases: Freedom of Speech, Assembly, and Expression
- Legal Marijuana: Perspectives on Public Benefits, Risks and Policy Approaches
- Opinions Throughout History: Guns in America
- Opinions Throughout History: Social Media
- Opinions Throughout History: The Environment
- Pathways for Peace: Inclusive Approaches to Preventing Violent Conflict
- ProCon
- ProCon Headlines
- Protest!: A History of Social and Political Protest Graphics
- The SAGE Handbook of Human Trafficking and Modern Day Slavery
- Shaping the Debate: Defining and Discussing Climate Change
- Shaping the Debate: Defining and Discussing Free Speech
- Shaping the Debate: Defining and Discussing Freedom of the Press
- Shaping the Debate: Defining and Discussing Human Rights
- Shaping the Debate: Defining and Discussing Immigration
- Shaping the Debate: Defining and Discussing Women's Rights
- Uncharted Waters: The New Economics of Water Scarcity and Variability
- What A Waste 2.0 : A Global Snapshot on Solid Waste Management to 2050
- Wiley Handbooks in Education: The Wiley Handbook on Violence in Education: Forms, Factors, and Preventions
- Social Sciences - Criminology & Law
- Social Sciences - Education
- Social Sciences - Ethnic Studies
- Social Sciences - Library science
- Social Sciences - Media & Communications
- Social Sciences - Political science
- Social Sciences - Research Methods & Study Skills
- Social Sciences - Sociology
- Social Sciences - Women, Gender, & Sexuality Studies
- Technology & Engineering - Aeronautics & Watercraft
- Technology & Engineering - Architecture
- Technology & Engineering - Engineering
- Technology & Engineering - Motor vehicles
- Technology & Engineering - Technology