"When ghost boy Kaz's haunt is torn down and he is separated from his ghost family, he meets a real girl named Claire, who lives above the town library with her parents and her grandmother. Claire has a special ability to see ghosts when other humans cannot and she and Kaz quickly form a friendship."--Amazon website.

Kaz and Claires new detective agency is a success! Their latest case, though, is proving to be the hardest yet. When Claires classmate says he saw a ghost backstage while rehearsing the school play, Kaz goes to school with Claire to investigate. From the description the boy gave, Kaz is sure its his mombut where has she gone? Kaz and Claire search everywhere and find no trace of her, but the mysterious ghostly activities are still happening

Now that Kaz can finally pass through walls without feeling all "skizzy," he can go explore Beckett's secret room at the back of the library. What he finds there is a mystery he never expected!

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.

"Kaz, Claire, and Little John are off to Seattle, where a new mystery awaits. The city library is planning a Halloween party, but a series of strange ghostly happenings has scared away all the kids. Now Claire and the ghosts must go underneath the city to find out who is trying to stop the party--and why"--Page [4] of cover.