A brand-new young chapter book series from Edgar Award winner Dori Hillestad Butler! 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. The two join forces to solve the mystery of the ghost that’s haunting the library. Could it be one of Kaz’s lost family members?

A wonderful Halloween adventure with Miss Smith and her students Miss Smith's students know to expect the unexpected when she reads from her magical book. This time, Miss Smith takes her kids to the eerie library down the block and introduces them to the weird librarian, Virginia Creeper. But per usual, storytime is never ordinary when reading from Miss Smith's Incredible Storybook. And what starts out as a run-of-the-mill field trip soon becomes a full-out monster bash!

Edgar Award Winner Dori Hillestad Butler gives us the tenth—and final!—title in her not-too-scary chapter book mystery series, The Haunted Library, in the form of a super special! It's almost Halloween, and Kaz and Claire are off to Seattle to visit Claire's cousins. They explore the local library...and find a ghost living there! The ghost's family has been missing, so Kaz and Claire decide to investigate. When they discover ghostly activity in the city's subterranean passages, they put their detective skills to work. Kaz and Claire are on the case!

A brand-new young chapter book series from Edgar Award winner Dori Hillestad Butler! After successfully solving the mystery of the ghost in the library, Kaz and Claire land the first case for their detective agency—a haunted attic in a neighbor’s home! With a little help from Grannie, Kaz and Claire discover that what appeared to be something spooky has a much simpler explanation.

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?

Kaz and Claire must try to figure out if their new client Eli really has a ghost in his house, or if Eli is just pulling pranks himself.

Kaz is an ordinary ghost. The wind separates Kaz from his family and carries him to a library far away, and he is scared he will be lost forever. That is, until he meets Claire--a human who can actually see him!

A wonderful Halloween adventure with Miss Smith and her students Miss Smith's students know to expect the unexpected when she reads from her magical book. This time, Miss Smith takes her kids to the eerie library down the block and introduces them to the weird librarian, Virginia Creeper. But per usual, storytime is never ordinary when reading from Miss Smith's Incredible Storybook. And what starts out as a run-of-the-mill field trip soon becomes a full-out monster bash!

When strange noises are heard in the tree house where their club meets, Claire and Kaz wonder if a rival club is causing problems in order to scare them away, or if they are coming from the ghosts of one of Kaz's departed ancestors.

With a lot of searching and a lot of luck, Kaz has found his dog Cosmo, his little brother Little John, his grandmom, and his grandpops. But what about his parents? Or his big brother Finn? Will he ever see them again? Kaz wants to keep looking for his family, but when Claire hears about a ghost at the fire station, Kaz knows it’s a case for C & K Ghost Detectives!