When Harry Harrison created "Slippery Jim DiGriz" (pun intended I'm certain), he created the mold for any number of book and movie heroes from that day forward.
Slippery Jim, or The Stainless Steel Rat, is a self reliant individual (well, at least with his gadgets) who strives to live outside the bonds of his highly documented, low privacy society. Sometimes this means being a thief, and sometimes a hero, but it always means clever solutions to well constructed problems, along with some adventure, colorful personalities, and extremely amusing asides, philosophies, and escapades.
The Stainless Steel Rat series of books are not great literature, but they did entertain me as much as anything I've ever read, and caused me to follow Harrison's writing through his other works (the ones that aren't about Slippery Jim). This first effort kicks things off in grand fashion, and shouldn't be missed by fans of sci-fi, humor, clever spy/thief stories, and farce. Very clever writing by a very clever man.