All books are magic, but some are more magical than others. When Susan opens a strange library book, she discovers it is about her and her friends, leading up to the moment when she opened the book. Beyond that, the pages are blank . . . waiting for the children to wish the book full of adventures. Fredericka asks for wizards and beasties, and a dragon carries her off. Susan journeys to the world of "Half Magic, " and finds that mixing magic creates trouble "far" too much to deal with before the book is due back at the library. Wishing, it seems, is a tricky business. And if the children make the wrong wish, their adventure won't end, as all stories must, happily ever after."