Ages 5-8 | Grade Level 3 | Choose from 10 Possible Endings Written in the second-person, the reader is the hero of the story who makes decisions along the way. You live in Hawaii, and are an expert sand castle builder. Overnight, your castle is enchanted by a magic spell. If you sneak off to see it, you might be shrunk down to the size of a mouse! Will you rescue someone trapped inside? Choose Your Own Adventure is the 4th bestselling children's book series of all time. Empowering generations of children through choice, it is widely commended for its appeal to reluctant readers.