When his haunt is torn down and he is separated from his ghost family, Kaz befriends human Claire, who has the ability to see ghosts, and helps her investigate a haunting at the local library.

Soon after Claire is called on to investigate a new case, her ghostly partner Kaz is reunited with his brother, Little John, who joins them in searching for the cause of strange phenomena that occur each afternoon at five o'clock.

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!

Investigating a classmate's claim that he saw a ghost backstage while rehearsing for the school play, Kaz and Claire, harboring suspicions that the ghost may be Kaz's mom, discover compelling evidence of otherworldly activities.

"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.