Series Description: Best friends and stepbrothers Phineas and Ferb are determined to make each day something special. Whether their bold escapades include building a rocket or discovering an ancient mummy, they're also cramping the style of their older sister, Candace. So she's determined to reveal their crazy endeavors to their mom! Meanwhile, the family's pet platypus has a secret identity as Agent P-and he repeatedly faces off with evil Dr. Doofenshmirtz to save the world. The days are packed for Phineas and Ferb because they plan to do it all! Chapter Book #5: Big Top Bonanza Phineas and Ferb always enjoy a good show. So when they hear that Cirque du Lune is coming to town, they can't wait to see it. When the show is cancelled, Phineas and Ferb decide to put on their very own circus. With Phineas as the ringmaster, and acts like mud-diving and hoop-jumping, soon they're bringing the house down. Even Perry the Platypus is getting into the action! But when Candace tries to prove her brothers aren't just clowning around, will the show go on?