Amazon.com description: Product Description: From the twisted and endlessly-innovative mind of sensational, award-winning writer Warren Ellis (The Authority, Transmetropolitan), comes Planetary, a mysterious organisation endlessly probing and dissecting the secret history of the Earth. But in Crossing Worlds, Planetary probe a little too far, tearing the very fabric of reality and finding themselves in alternate universes! There they encounter jackbooted metahumans The Authority; a twisted incarnation of fabled superteam the JLA; and various versions of the Dark Knight himself, Batman! Battling either alongside or against Planetary, these three new stories feature a host of familiar legends and heroes as they've never been seen before!