Check out Al Gore: A User's Manual, by Alexander Cockburn and Jeffrey St. Clair, first published in the U.K. in 2000. Cockburn has been arguing for years that AGW is pure B.S. and that Al Gore's embrace of AGW is first and foremost about Gore's personal quest for power.
(Cockburn called the book a user's manual on the grounds that every expensive and complex tool requires a user's manual, and Gore is a real tool.)
Good for Cockburn, he has been on to the fraud for a long time. I rarely agree with him, but he nails it on this one.