- Krulik, Nancy E, Katie Kazoo, switcheroo, 1
- Soccer shocker, by Nancy Krulik and Amanda Burwasser ; illustrated by Mike Moran
- Hair today, gone tomorrow!, by Nancy Krulik ; illustrated by John & Wendy
- Krulik, Nancy E, Katie Kazoo, switcheroo, 16
- Tip-top tappin' mom, by Nancy Krulik ; illustrated by John & Wendy
- Have a slice day, Nancy Krulik ; illustrated by Charlie Alder
- Krulik, Nancy E, Katie Kazoo, switcheroo, 11
- Super burp!, by Nancy Krulik ; illustrated by Aaron Blecha
- Krulik, Nancy E, Great mathemachicken, 2
- Krulik, Nancy E, Ms. Frogbottom's field trips, 2
- On your mark, get set, laugh!, by Nancy Krulik ; illustrated by John & Wendy
- Anyone but me, by Nancy Krulik ; illustrated by John & Wendy
- Out to lunch, by Nancy Krulik ; illustrated by John & Wendy
- Krulik, Nancy E, Katie Kazoo, switcheroo, 2
- Krulik, Nancy E, Great mathemachicken, 1
- Oh, baby!, by Nancy Krulik ; illustrated by John & Wendy
- Krulik, Nancy E, Katie Kazoo, switcheroo, books 1-4
- Long time, no sea monster!, by Oliver, as told to Nancy Krulik ; illustrated by Harry Briggs
- Krulik, Nancy E, Katie Kazoo, switcheroo, super special!
- Krulik, Nancy E, How I survived middle school
- Katie Kazoo, switcheroo, a collection of Katie, by Nancy Krulik ; illustrated by John & Wendy, Books 1-4
- Don't be such a turkey!, by Nancy Krulik ; illustrated by John & Wendy
- Katie Kazoo, Switcheroo, Nancy Krulik
- Any way you slice it, by Nancy Krulik ; illustrated by John & Wendy
- Krulik, Nancy E, Katie Kazoo, switcheroo, 34
- Scholastic's the magic school bus in a pickle, a book about microbes, [TV tie-in adaptation by Nancy E. Krulik and illustrated by Bob Ostrom]
- Katie Kazoo, switcheroo, Nancy Krulik, Books 11 & 12
- Krulik, Nancy E, Katie Kazoo, switcheroo, 03
- I want my mummy!, by Tony, as told to Nancy Krulik ; illustrated by Harry Briggs
- Sing high, sing crow, Nancy Krulik ; illustrated by Charlie Alder
- World's worst wedgie, by Nancy Krulik ; illustrated by Aaron Blecha
- Krulik, Nancy E, Katie Kazoo, switcheroo, 9
- Krulik, Nancy E, Katie Kazoo, switcheroo
- Science no fair!, Nancy Krulik and Amanda Burwasser ; illustrated by Mike Moran
- Krulik, Nancy E, Project droid
- Krulik, Nancy E, George Brown, class clown, 2
- Bad rap, by Nancy Krulik ; illustrated by John & Wendy
- Katie Kazoo switcheroo, Nancy Krulik, Books 1-2
- Doggone it! ;, Any way you slice it, by Nancy Krulik ; illustrated by John & Wendy
- A whirlwind vacation, by Nancy Krulik ; illustrated by John & Wendy
- All's fair, by Nancy Krulik ; illustrated by John & Wendy
- Krulik, Nancy E, George Brown, class clown, 1
- Katie Kazoo switcheroo, Nancy Krulik, Bks. 3-4
- Is it Hanukkah yet?, by Nancy Krulik ; illustrated by Dyanne Di Salvo-Ryan
- How I survived middle school, Can you get an F in lunch?, by Nancy Krulik
- Krulik, Nancy E, Katie Kazoo, switcheroo, 7-8
- Krulik, Nancy E, Katie Kazoo, switcheroo, 14
- Krulik, Nancy E, Mrs. Frogbottom's field trips, 1
- Krulik, Nancy E, Katie Kazoo, switcheroo, 22
- Red, white, and-- achoo!, by Nancy Krulik ; illustrated by John & Wendy