Series Description: Best friends and stepbrothers Phineas and Ferb are determined to make each mind-numbing rotation of Earth into something special. But their sister, Candace, is determined to reveal their crazy endeavors to their mom. Meanwhile, Perry the Platypus—Agent P—is called on repeatedly to save the world from dangerous Dr. Doofenshmirtz. Spend some time with Phineas and Ferb and see just how exciting and outrageous a summer’s day can really be! Chapter Book #4: Thrill-o-rama! The days and nights get spooky when Phineas and Ferb create a haunted house. Their friend Isabella has an extreme case of hiccups, and the boys plan to scare them out of her. What better way than a creepy house that's full of shocking surprises and thrilling twists and turns? Plus, Phineas and Ferb search for a mummy in an old theater showing monster movies.