- Earth
- My first encyclopedia, written by Carol Watson ; illustrated by Mark Ruffle and Ed Myer
- Encyklopedia Wiedzy o Ksiazce
- Space
- Constitutional amendments, encyclopedia of the people, procedures, politics, primary documents relating to the 27 amendments to the U.S. Constitution, Mark Grossman ; contributing authors: Scott Derks; Schlager Group Inc
- Encyclopedia of dubious archaeology, from Atlantis to the Walam Olum, Kenneth L. Feder
- International encyclopedia of linguistics, William J. Frawley, editor-in chief
- Reptiles, by Janet Riehecky ; consultant Jackie Gai, DVM, Wildlife Veterinarian
- Encyclopedia of pets & pet care, the essential family reference guide to pet breeds and pet care, David Alderton ... [and others]
- The Vonnegut Encyclopedia, revised and updated edition, Marc Leeds
- Technology
- Human beings
- The encyclopedia of animals, [edited by Tim Harris]
- The Kingfisher dinosaur encyclopedia, [Professor Mike Benton]
- Medical symptoms, a visual guide, senior editor, Miezan van Zyl
- The Encyclopedia of human rights, Edward H. Lawson, editor
- The encyclopedia of epic films, Constantine Santas, James M. Wilson, Maria Colavito, Djoymi Baker
- Kingfisher children's A to Z encyclopedia
- Smart medicine for healthier living, [a practical A-to-Z reference to natural and conventional treatments for adults], Janet Zand, Allan N. Spreen, James B. LaValle
- Firefly encyclopedia of reptiles and amphibians, general editor: Chris Mattison
- Television specials, 5,336 entertainment programs, 1936-2012, Vincent Terrace
- First history encyclopedia, author, Philip Wilkinson
- The moviemaking magic of Marvel Studios, heroes + villains, written by Eleni Roussos
- New illustrated Irish history, Guy de la Bédoyère, Michael Kerrigan [and others] ; general editor, Séamas Mac Annaidh
- The horse-lover's encyclopedia, AيZ Guide to All Things Equine: Barrel Racing, Breeds, Cinch, Cowboy Curtain, Dressage, Driving, Foaling, Gaits, Grulla, Legging Up, Mustang, Piebald, edited by Jessie Haas
- New Larousse encyclopedia of mythology, introd. by Robert Graves. [Translated by Richard Aldington and Delano Ames, and rev. by a panel of editorial advisors from the Larousse mythologie généralé edited by Felix Guirand
- The Olympics encyclopedia for kids, by Chrös McDougall
- Health care policy and politics A to Z, Julie Rovner
- Vitamins and minerals, fact versus fiction, Myrna Chandler Goldstein and Mark A. Goldstein, MD
- My encyclopedia of very important adventures, [for little learners who love exciting journeys and incredible discoveries, text by Ben Hubbard, Wil Mara, Andrea Mills, Joe Norbury, Becky Walsh, Graeme Williams]
- Family health encyclopedia, the comprehensive guide to the whole family's health needs, Dr Peter Fermie, Dr Stephen Shepherd
- Encyclopedia of atmospheric sciences, editor-in-chief, James R. Holton ; editors, Judith A. Curry, John A. Pyle
- Geopedia, a brief compendium of geologic curiosities, Marcia Bjornerud ; illustrations by Haley Hagerman
- Encyclopedia of aquarium & pond fish, David Alderton ; photography by Max Gibbs
- The Grand Canyon, an encyclopedia of geography, history, and culture, Randy Moore and Kara Felicia Witt
- The Kingfisher soccer encyclopedia, Clive Gifford
- Disney Pixar character encyclopedia, Shari Last
- An encyclopedia of Tolkien, the history and mythology that inspired Tolkien's world, David Day
- The very hungry caterpillar's very first encyclopedia, text contributor, Joy Evatt
- Plantopedia, a celebration of nature's greatest show-offs, Adrienne Barman ; additional text and translation into English by Amy-Jane Beer and Felicity Davidson
- Rodale's ultimate encyclopedia of organic gardening, the indispensable green resource for every gardener, edited by Fern Marshall Bradley, Barbara W. Ellis, and Ellen Phillips with Deborah L. Martin ; illustrations by Michael Gellatly
- My encyclopedia of the forest, Alain Pontoppidan; translated by Joy Nevin Axelson
- Star Wars, character encyclopedia, by Simon Beecroft, Elizabeth Dowsett, and Pablo Hidalgo
- Mythopedia, an encyclopedia of mythical beasts and their magical tales, Good Wives and Warriors
- My encyclopedia of very important things, project editor, James Mitchem
- The world encyclopedia of butterflies & moths, a natural history and identification guide to over 565 varieties around the globe, Sally Morgan
- The ultimate encyclopedia of mythology, an A - Z guide to the myths and legends of the ancient world, Arthur Cotterell & Rachel Storm
- Birdpedia, a brief compendium of avian lore, Christopher W. Leahy ; illustrated by Abby McBride
- The encyclopedia of philosophy, Paul Edwards, editor in chief
- Gale enciclopedia de la medicina, Joseph Palmisano, editor