Joey teams up with alternate versions of himself from an array of these worlds. Together, the army of Joeys must battle evil magicians Lord Dogknife and Lady Indigo to keep the balance of power between all the earths stable.
A co-worker gave me a copy of this book a few years ago, and I finally got around to reading it while sitting in airports on a recent quick trip out of town. It contains intricate world building, interesting characters, moments of poignancy, and a good enough story. It's not my favorite Gaiman work, but I enjoyed it well enough to look forward to reading the next book in the series, which my co-worker also gave me.