A summer boat trip turns into a day of tropical-island survival when the Flynn-Fletcher family gets shipwrecked! Making the best of the situation, Phineas and Ferb build an elaborate tree house. But will these unlikely castaways be able to find a way off the island? Featuring exciting full-color art from the show, this first installment of the Phineas and Ferb Level 3 reader series is perfect for fans who are ready to read on their own.