Steven Manly

A very readable and thought-provoking discussion of multiverses. It asks the questions do parallel universes exist? and is out universe one of many? Don't expect any certain answers!

Considerably shorter and more jocular than other recent books* enumerating various multiple-universe concepts, such as Gribbin's and Greene's. Arguably less a cosmology book than a modern fundamental-physics book -- nothing wrong with that. (*All of which get scorned by Peter Woit in his Not Even Wrong physics blog, but he doesn't speak for everybody.)