Book Description: Series Description: Phineas and Ferb know that with only one hundred and four days of summer vacation, youâ€™ve got to make every one count! Whether theyâ€™re building a rocket or discovering an ancient mummy, theyâ€™re dedicated to making each mind-numbing rotation of the earth into something really special. While their sister Candace tries fruitlessly to reveal their crazy endeavors to their mom and Perry the Platypus is saving the world from the dangerous Dr. Doofenshmirtz, Phineas and Ferb are filling their days with one adventure after another.Title Descriptions:Chapter Book #1: Speed DemonsÂ Lazy summer days? Not for Phineas and Ferb. One day the duo fixes up their momâ€™s car and takes it to the races. The next they build the worldâ€™s craziest roller coaster! The neighborhoodâ€™s not likely to be the same after this. But will Dr. Doofenshmirtzâ€™s plan to reverse the spin of the earth with a magnet trained at the eastern seaboard succeed and ruin things for everyone?