A game of fetch seems simple enough, but add in an easily distracted puppy, a fence, and yard full of look-alike balls and you end up with a mystery. Is a mouse really behind all this mayhem? Another fun mystery with a lovable detective team. While King, a lovable dog, and his human girl Kayla play fetch with their friends, Jillian and Thor, Jillian throws King's favorite ball too hard, and now it's missing! King and Kayla must put together the clues to figure out where it went and who has it. Illustrations.