In the new early-reader series by Dori Hillestad Butler, pup King and his faithful human Kayla solve everyday mysteries. King desperately wants some treats in King & Kayla and the Case of the Missing Dog Treats (Peachtree, $14.95), but they aren’t for him! He begs and begs, but they are for Kayla’s friend Jillian and her new puppy Thor. However, when the peanut butter goodies go missing, it’s up to King and Kayla to crack the case. In King & Kayla and the Case of the Secret Code (Peachtree, $14.95), Kayla gets an indecipherable letter on her porch. King’s nose is immediately on the hunt, and he sniffs out some clues with Kayla and her friend Mason. With illustrations by Nancy Meyers and fun clue-cracking devices attached, these early readers are the perfect mixture of humor and adventure. Ages 6-9.