Heidi Heckelbeck Has a Secret

Heidi Heckelbeck Gets the Sniffles, 12

Henry Heckelbeck Builds a Robot, 8

Henry Heckelbeck Spy vs. Spy, 7

Heidi Heckelbeck and the Snoopy Spy, Volume 23

Heidi Heckelbeck and the Never-Ending Day

Heidi Heckelbeck Is So Totally Grounded!, Volume 24

Heidi Heckelbeck and the Hair Emergency!, 31

The Henry Heckelbeck Collection: Henry Heckelbeck Gets a Dragon; Henry Heckelbeck Never Cheats; Henry Heckelbeck and the Haunted Hideout; Henry Heckel

Heidi Heckelbeck 3 Books in 1!: Heidi Heckelbeck Has a Secret; Heidi Heckelbeck Casts a Spell; Heidi Heckelbeck and the Cookie Contest