Who says cats and dogs don't get along? A snobby cat and a good-natured dog team up--sort of--to solve the mystery of a missing classroom pet in this playful illustrated chapter book told in letters. Simon the cat and Baxter the dog have finally learned how to share their owner, Andy. It helps that Simon lives with Andy's mom and Baxter lives with Andy's dad. When a problem comes up, they simply exchange letters to sort it out. Baxter's spelling has even improved, though not by much. But then Andy's class pet goes missing, causing an argument with his friend Noah. Andy is so, so sad. Now it's every pet for himself! Both Simon and Baxter want to solve the mystery and make Andy happy again. Which pet will collect the clues and piece together the solution? Or will another neighborhood animal get there first . . . This funny and heartwarming collaboration between Geisel Honor and Edgar Award-winning author Dori Hillestad Butler and bestselling illustrator Kevan Atteberry is a tribute to the love of a good pet--and the joy found in new friendship. With eight chapters and adorable full-color illustrations on every spread, the series is a perfect read for parents to share with kids.

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. By the Edgar Award for Best Juvenile Mystery-winning author of The Buddy Files. Simultaneous and eBook.

Landing a first official case after solving the mystery of the library ghost, Kaz and Claire investigate a neighbor's attic to see if they can discover an explanation for its seemingly spooky qualities. By the award-winning author of Trading Places With Tank Talbott. Simultaneous and eBook.

Kaz and Claire’s new detective agency is a success! Their latest case, though, is proving to be the hardest yet. When Claire’s 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 it’s his mom—but where has she gone? Kaz and Claire search everywhere and find no trace of her, but the mysterious ghostly activities are still happening…

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. Simultaneous and eBook.

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!

When the fire station's new dog, Sparky, finds a ghost at the door of the TV room, Kaz and Claire investigate, hoping the ghost may be one of Kaz's relatives.

Here is Edgar Award Winner Dori Hillestad Butler's seventh title in her not-too-scary chapter book mystery series, The Haunted Library. Perfect for reluctant readers in the mood for a great mystery! A group of girls in Claire’s town have noticed strange sights and sounds coming from the tree house where their club meets. Is it a rival boys’ club trying to scare them away? Or is it a ghost? The girls ask Claire to tackle the mystery—and Kaz hopes to finally find the rest of his missing family members!

Here is the eighth title in Edgar Award Winner Dori Hillestad Butler's not-too-scary chapter book mystery series, The Haunted Library. Kaz are Claire are called on for another case! A family thinks their house is haunted, making it difficult for them to sell it.  Will Kaz and Claire be able to figure out what's going on, and find more of Kaz's family members along the way?

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?

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 lovable dog helps his human girl solve a mystery. Kayla made peanut butter treats for Jillian?s new puppy Thor. But now the treats are missing. What does Kayla know? ?There are three treats missing. King was in the kitchen. King's breath doesn't smell like peanut butter. What does King know? ?There's an intruder in the house. How will they solve the mystery?

A lovable dog helps his human girl solve a mystery. Kayla and Mason both got mysterious letters, written in code. What does Kayla know? ?The same person left both letters. It's someone she and Mason both know. The two letters are the same, except for the second word.What does King know? ?Jillian left the letters. What do the letters say?

A lovable dog helps his human girl solve a mystery. King and Kayla are playing fetch with their friends, Jillian and Thor. Jillian throws King?s favorite ball too hard, and now it?s gone missing! King and Kayla must put together the clues to figure out where it went?and who has it.

A lovable dog helps his human girl solve a mystery. King and Kayla are playing fetch with their friends, Jillian and Thor. Jillian throws King?s favorite ball too hard, and now it?s gone missing! King and Kayla must put together the clues to figure out where it went?and who has it.

Kayla places her tooth in a Tooth Fairy pillow, but it disappears before the Tooth Fairy has a chance to visit--can her dog King help Kayla find the missing tooth?