- The bug encyclopedia, by Meg Marquardt
- Amazing plants of the world, author: Štěpánka Sekaninová ; illustrator: Zuzana Dreadka Krutá
- Victorian nonfiction prose, a companion, Kathy Rees
- Spider-Man character encyclopedia, written by Daniel Wallace and Melanie Scott
- Space!, The universe as you've never seen it before/, Dorling Kindersley Ltd
- The new children's encyclopedia, Claudia Martin, Giles Sparrow, Clare Hibbert, Honor Head, Michael Leach, and Meriel Lland
- The encyclopedia of misinformation, a compendium of imitations, spoofs, delusions, simulations, counterfeits, impostors, illusions, confabulations, skullduggery, frauds, pseudoscience, propaganda, hoaxes, flimflam, pranks, hornswoggle, conspiracies & miscellaneous fakery, Rex Sorgatz ; illustrated by Lorenzo Petrantoni
- The human body encyclopedia, by Linda Cernak
- Encyclopedia of insects, [written by Jules Howard ; illustrated by Miranda Zimmerman]
- The unofficial encyclopedia of ultimate challenges for Minecrafters, new adventures and thrilling dares to take your game to the next level, Megan Miller
- Encyclopedia of herbal medicine, Andrew Chevallier, FNIMH
- The new children's encyclopedia, US editors, Margaret Parrish, Karyn Gerhard, Megan Douglass
- Elements, author, Tom Jackson
- The giant encyclopedia of math activities for children 3 to 6, written by teachers for teachers ; edited by Kathy Charner, Maureen Murphy, and Charlie Clark
- Star Wars The Clone Wars character encyclopedia, join the battle!, written by Jason Fry
- Earth knowledge genius!, a quiz encyclopedia to boost your brain, written by Clive Gifford, Lizzie Munsey and Ian Fitzgerald ; consultant: David Holmes
- Encyclopedia of American Indian history & culture, stories, time lines, maps, and more, Cynthia O'Brien
- Myths, legends & sacred stories, a visual encyclopedia, [written by Philip Wilkinson]
- Space!, Dorling Kindersley Ltd
- The Kingfisher dinosaur encyclopedia, [Professor Mike Benton]
- An anthology of intriguing animals, written Ben Hoare ; illustrated by Daniel Long, Angela Rizza, and Daniela Terrazzini
- The Facts on File encyclopedia of health and medicine
- Classical mythology A to Z, an encyclopedia of gods & goddesses, heroes & heroines, nymphs, spirits, monsters, and places, Annette Giesecke ; illustrated by Jim Tierney
- Dinosaur!, dinosaurs and other amazing prehistoric creatures as you've never seen them before, written by John Woodward ; consultant, Darren Naish ; illustrators, Peter Minister, Arran Lewis, Andrew Kerr, Peter Bull, Vlad Konstantinov, James Kuether
- The arts, a visual encyclopedia, Susie Hodge, David Taylor, Joe Fullman, Peter Chrisp
- Children's encyclopedia of predators, Alex Woolf and Claire Philip
- Animal knowledge genius!, written by Stevie Derrick and Lizzie Munsey ; consultant John Woodward
- The cat encyclopedia for kids, by Merriam Garcia
- Jurassic World dinosaur field guide, by Dr. Thomas R. Holtz, Jr. and Dr. Michael Brett-Surman ; illustrated by Robert Walters
- The World Book encyclopedia [2021], World Book Inc
- One million things, a visual encyclopedia, contributors and consultants: Chris Barker, Hazel Beynon, Kim Bryan, Laura Buller, Jack Challoner, Peter Chrisp, Mike Goodman, Derek Harvey, Andrea Mills, Simon Mumford, [and 7 others]
- Our world in numbers, an encyclopedia of fantastic facts, written by Clive Gifford
- Dinosaurs, a visual encyclopedia
- Children's first dinosaur encyclopedia, written by Claudia Martin ; consultant, Dougal Dixon
- The giant book of who, what, when, where, why & how, 3,000+ fascinating facts for kids
- The Star Wars book, Pablo Hidalgo, Cole Horton, Dan Zehr
- Explanatorium of science /, senior editor, Jenny Sich
- Star Wars character encyclopedia, written by Simon Beecroft, Elizabeth Dowsett, and Pablo Hidalgo
- My encyclopedia of very important dinosaurs, edited by Sally Beets, Hélène Hilton, Violet Peto
- Star Wars encyclopedia of starfighters and other vehicles, written by Landry Q. Walker
- Trees, leaves, flowers & seeds, written by Dr. Sarah Jose ; consultant, Dr. Chris Clennett
- Super science encyclopedia, authors, Jack Challoner, Dr. Kat Day, Hilary Lamb, Georgia Mills, Bea Perks ; consultant, Jack Challoner
- Disney Pixar character encyclopedia, edited by Shari Last
- The horse encyclopedia for kids, by Ethan Pembroke
- LEGO DC character encyclopedia, written by Elizabeth Dowsett, Simon Hugo, and Cavan Scott
- Ultimate bugopedia, the most complete bug reference ever, by Darlyne Murawski & Nancy Honovich
- Pigology, the ultimate encyclopedia, text, Daisy Bird ; illustration, Camilla Pintonato
- Animal encyclopedia, 2,500 animals with photos, maps, and more!, Dr. Lucy Spelman
- Colors in nature, Jana Sedĺačkovǎ, Šěpánka Sekaninová, author ; Magdalena Konečná, illustrator
- Batman character encyclopedia, written by Matthew K. Manning ; Batman created by Bob Kane with Bill Finger