- The Hospital Book (1981)
- A Night without Stars (1983)
- How the Ewoks Saved the Trees: An Old Ewok Legend (1984) - based on the Ewoks from Star Wars: Return of the Jedi
- Morgan's Zoo (1984)
- Mr. Tinker in Oz (1985) - based on the mythology of L. Frank Baum's Wizard of Oz series
- Babes in Toyland (1986)
- I Wish I Were a Butterfly (1987) - Illustrated by Ed Young
- Dances with Wolves: A Story for Children (1991) - featuring photographs by Ben Glass, based on the book and film Dances with Wolves written by Michael Blake
- The Day The Teacher Went Bananas (1992)
- The Secret Garden: A Stepping Stone Book (1993) (as adaptor of Frances Hodgson Burnett's classic novel)
- Playing With Words (1994)
- When You Go to Kindergarten (1994)
- The New Nick Kramer, or My Life as a Baby-sitter (1995)
- The Watcher (1997)
- The Misfits (2001)
- Kaddish for Grampa in Jesus Name Amen (2004)
- Totally Joe (2005)
Bunnicula series
Audiobook versions were also released featuring narrators Victor Garber and Patrick Mulvihill.
- A Rabbit-Tale of Mystery (with Deborah Howe) (1979) (also released as a 25th Anniversary edition)
- Howliday Inn (1982)
- The Celery Stalks at Midnight (1983)
- Nighty-Nightmare (1987)
- Return to Howliday Inn (1992)
- Bunnicula Strikes Again! (1999)
- Bunnicula Meets Edgar Allan Crow! (2006)
Harold and Chester over-sized picture books
All illustrated by Leslie H. Morrill (except
Rabbit-Cadabra! which was illustrated by Alan Daniel).
- The Fright Before Christmas (1988)
- Scared Silly: A Halloween Treat (1988)
- Hot Fudge (1991)
- Creepy-Crawly Birthday (1992)
- Rabbit-Cadabra! (1993)
- A Book of 3 Spooky Plays - Play versions of Creepy-Crawly Birthday, The Fright Before Christmas, and Scared Silly: A Halloween Treat
Tales from the House of Bunnicula series
All illustrated by Brett Helquist. Audiobook versions of many titles in this series were released featuring narrator Joe Grifasi.
- It Came From Beneath the Bed! (2002)
- Invasion of the Mind Swappers from Asteroid 6! (2002)
- Howie Monroe and the Doghouse of Doom (2003)
- Screaming Mummies of the Pharaoh's Tomb II (2003)
- Bud Barkin, Private Eye (2004)
- The Odorous Adventures of Stinky Dog (2003)
- Tales From the House of Bunnicula: Writing Journal (a blank journal featuring artwork by Brett Helquist)
Bunnicula and Friends a Ready-To-Read series
Many of these titles are re-workings of previously released Bunnicula books rewritten by James Howe for younger readers and featuring new illustrations by Jeff Mack.
- The Vampire Bunny (2004)
- Hot Fudge (2004)
- Scared Silly (2004)
- Rabbit-Cadabra (2006)
- The Fright Before Christmas (2006)
- Creepy Crawly Birthday (2007)
Bunnicula pop-up book
One
Bunnicula related pop-up book was released. It features a unique story and it is illustrated by Alan Daniel and Lea Daniel.
- Bunnicula Escapes!: A Pop-up Adventure (1994)
Bunnicula activity, fact, and joke books
All illustrated by Alan Daniel.
- Bunnicula's Wickedly Wacky Word Games: a Book for Word Lovers & Their Pencils! (1998)
- Bunnicula's Frightfully Fabulous Factoids: a Book to Entertain Your Brain! (1999)
- Bunnicula's Pleasantly Perplexing Puzzlers: A Book of Puzzles, Mazes, & Whatzits! (1999)
- Bunnicula's Long-lasting Laugh-alouds: a Book of Jokes & Riddles to Tickle Your Bunny-Bone! (1999)
Pinky and Rex series
All illustrated by Melissa Sweet
- Pinky and Rex (1990)
- Pinky and Rex Get Married (1990)
- Pinky and Rex and the Spelling Bee (1991)
- Pinky and Rex and the Mean Old Witch (1991)
- Pinky and Rex Go To Camp (1992)
- Pinky and Rex and the New Baby (1993)
- Pinky and Rex and the Double-dad Weekend (1995)
- Pinky and Rex and the Bully (1996)
- Pinky and Rex and the New Neighbors (1997)
- Pinky and Rex and the School Play (1998)
- Pinky and Rex and the Perfect Pumpkin (1998)
- Pinky and Rex and the Just-right Pet (2001)
Sebastian Barth Mystery series
- What Eric Knew (1985)
- Eat your Poison, Dear (1986)
- Stage Fright (1986)
- Dew Drop Dead (1990)
There's a series
- There's a Monster Under My Bed (1986)
- There's a Dragon in My Sleeping Bag (1994)
Horace and Morris (and Dolores) series
All illustrated by Amy Walrod
- Horace and Morris, but Mostly Dolores (1999)
- Horace and Morris Join the Chorus, but What About Dolores (2002)
- Horace and Morris Say Cheese (Which Makes Dolores Sneeze!) (forthcoming 2009)
Houndsley and Catina series
All illustrated by Marie-Louise Gay
- Houndsley and Catina (2006)
- Houndsley and Catina and the Birthday Surprise (2007)
- Houndsley and Catina and the Quiet Time (2008)
- Houndsley and Catina Plink and Plunk (forthcoming 2009)
The Muppets books
Book based on Jim Henson's Muppets & Muppet Babies:
- The Case of the Missing Mother (illustrated by William Cleaver) (Random House, 1983)
- The Muppet Guide to Magnificent Manners (illustrated by Peter Elwell) (Random House, 1984)
- A Love Note for Baby Piggy (illustrated by Kathy Spahr) (Weekly Reader, 1986)
Anthologies
- It's Heaven to be Seven (2000) (with Roald Dahl, Beverly Cleary, and Patricia MacLachlan)
- The Color of Absence: 12 Stories About Loss and Hope (2001) (as editor)
- 13: Thirteen Stories That Capture the Agony and Ecstasy of Being Thirteen (2003) (as editor)