InterWorld/Neil Gaiman & Michael Reaves/239 pgs./May Challenge

Joey Harker, a high school sophomore, stumbles into an alternate world; in fact, he discovers that there are multiple earths with different properties. There are also different versions of himself coming from these alternate worlds. He comes to discover that some of these worlds are ruled by magic, and others by science--and the worlds are at war with each other! In order to keep the balance of power among the worlds even, Joey, and a team of his alternates, must battle the evil Lord Dogknife and Lady Indigo. It has action and suspense--very enjoyable!