The Stainless Steel Rat: The Stainless Steel Rat Book 1 by Harry Harrison
In the vastness of space, the crimes just get bigger and Slippery Jim diGriz, the Stainless Steel Rat, is the biggest criminal of them all. He can con humans, aliens and any number of robots time after time. Jim is so slippery that all the inter-galactic cops can do is make him one of their own.