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| K | Book and author | Other notes |
| Karl | Zen Panda books by Jon J. Muth Animal Rescue books by Tina Nolan Clockwork by Philip Pullman | S S |
| Karol (m) | The Astounding Broccoli Boy by Frank Cotrell Boyce | |
| Kate Katie Kat Katy | Bathwater’s Hot by Shirley Hughes Kate, the Cat and the Moon by David Almond Katie Morag books by Mairi Hedderwick The Best Party of Them All by Hiawyn Oram Katie art books by James Mayhew Katie McGinty Wants a Pet by Jenna Harrington The Owls of Blossom Wood by Catherine Coe Harry Potter books by J. K. Rowling The London Eye Mystery by Siobhan Dowd Girl 38: Finding a Friend by Ewa Jozefkowicz Katy Cat by Lucy Cousins Sick as a Parrot by Michaela Morgan The Visitors Who Came To Stay by Annalena McAfee What Katy Did by Susan Coolidge | S S, BP S S, ! S |
| Katherine | Counting on Katherine by Helaine Becker | N |
| Kathleen | Dogsbody by D.W. Jones | |
| Keith | Keith the Cat with the Magic Hat by Sue Hendra All About Keith by Davey Moore (a Claude book) | |
| Kerry | Topsy and Tim and the Dinosaurs by Gareth and Jean Adamson | |
| Kevin | Wibbly Pig books by Mick Inkpen Super Snail by Elys Dolan The Legend of Kevin by Philip Reeve | |
| Kittie Kitty | Fairytale Hairdresser books by Abie Longstaff It’s Not Fair! and other books by Bel Mooney Pudge’s Play by Hiawyn Oram Evie’s War by Holly Webb The Secret Diary of Kitty Cask by Philip Ardagh Matt Millz by Harry Hill | S S ! |
| Klaus | A Series of Unfortunate Events books by Lemony Snicket | S |
| Koko | The Astounding Broccoli Boy by Frank Cotrell Boyce | |
| Kya | Tilly’s Horse, Magic books by Pippa Funnell | S, V |
