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! Title Descriptions: ''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.