Enter the whirlwind of the discworld. 
 This is the opening novel of the Discworld series. A laugh out loud, grin like an idiot kind of book. Rinswind our main characters is failed wizzard (yes that is spelled correct) that gets roped in to play guide, to the most astounding thing the wretched city of ankh-morpork has ever seen......A tourist!!! 
 Yes its that kind of book. An comedic fantasy where gods literally play games and being a hero is a profession. Expect to be surprised and have your preconceived notions of what a fantasy novel is and should be turned upside done and shaken for good measure. 
 A definite fantasy must read.