Dylan's Villain by Kathleen Troy (Hardcover)

Casey, his American Cocker Spaniel Dylan, and their best friend Sumo-better known as Dylan's Dog Squad-have a blast using their search and rescue skills to find Bailey, a kleptomaniac chimp.

But when Dream Big K-9 Academy needs their help to save their business from The Sledgehammer, a notorious criminal, Dylan's Dog Squad learns what it means to come to the rescue and what it means to be a friend.