Caroline enjoys having a baby guinea pig so much, that she wants her best friend to get one, too. Then, their guinea pigs can be best friends, just like they are Caroline comes up with a top secret plan to encourage Millie to get one. Caroline knows that she needs to be honest, and worries that her plan is getting her close to fibbing to her friend. Will Caroline's plan work? What is the big discussion Millie's family had? And why does Millie keep looking at her funny? Caroline is sure they'll be getting a brand new guinea pig soon Written in journal style with illustrations based on how the author drew as a child, the Caroline's Cavy series presents young readers with a pair of believable and fun-loving new friends.