Dori Hillestad Butler

When King's favorite blue ball goes missing, he and Kayla must put together clues to figure out where it went.

King & Kayla hunt for Asia's missing gold ring.

Tired of being told what to write by the school newspaper's advisor, Zibby and her friend Amr start an underground newspaper online where everyone is free to post anything, but things spiral out of control when a cyberbully starts using the site to harrass one popular girl.

When thirteen-year-old Joelle, a star baseball player, moves to a new town where the only option for girls is softball, she starts an all-girl baseball league against the wishes of her school coaches and others in the town.

What happens when everything you thought was true about your life turns out to be a lie? Thirteen-year-old T.J. always believed that her twin sister and her mother were dead-because that's what her father had told her. But Mom and Sam are very much alive. And now they want T.J. to be part of their family. Life with Joe, her troubled but well-intentioned father, is all T.J. has ever known. Joe's erratic lifestyle has meant lying to social workers and...

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.

When one of Kayla's library books goes missing, King and Kayla's friend Jillian must help her solve the crime.

King and Kayla go on a sleepover adventure at Thor and Jillian's house, where they investigate spooky occurrences in the basement.