Book 1


Book 2

Ghost in the Attic

by Dori Hillestad Butler

Published 14 August 2014

Book 3

Ghost Backstage

by Dori Hillestad Butler

Published 13 November 2014

Book 4


Book 5

Secret Room

by Dori Hillestad Butler

Published 11 August 2015

Book 6


Book 7


Book 8

The wind separates Kaz the ghost from his family and carries him to a library far away. When he meets Claire - a human who can actually see him - they must work together and solve some mysteries to find Kaz's family.

Book 8


Book 9

Edgar Award Winner Dori Hillestad Butler gives us the ninth title in her not-too-scary chapter book mystery series, The Haunted Library.

Kaz are Claire are on the case again—this time, they're looking for Kaz's long-lost uncle! Their search takes them to a bakery and a movie theater. Along the way, they meet another kid ghost detective. Will Kaz and Claire be able to figure out what's going on?

Book 9

Edgar Award Winner Dori Hillestad Butler gives us the ninth title in her not-too-scary chapter book mystery series, The Haunted Library.

Kaz are Claire are on the case again—this time, they're looking for Kaz's long-lost uncle! Their search takes them to a bakery and a movie theater. Along the way, they meet another kid ghost detective. Will Kaz and Claire be able to figure out what's going on?

Book 10

Underground Ghosts

by Dori Hillestad Butler

Published 15 August 2017