Boo and Peanut are headed to dog training with Anna and her brother, Jack. Boo doesn't want to go, but Anna convinces him that it'll be fun--and good for Peanut, too. When they get there, Boo finds so many exciting smells and sees so many fun things to play with. There are balls to chase, ramps to run up and down, and more. Maybe it won't be so bad after all! Then Peanut gets scared by a bigger dog and takes off running across the room, creating chaos, and ends up stuck at the top of a curtain! Can Boo help his sister--and make it through the rest of the class? This follow-up to Boo and the New Puppy is a fun introduction to the idea that while new experiences can be scary, they can also be fun!