The most wonderful and brilliant Neil Gaiman (if you're a comic book or graphic novel fan, you may know of Sandman; he also co-wrote the screenplay for last year's Beowulf), has had Harper Collins put up a full length e-copy of American Gods online. You can find it here. Please spread it widely around the internet, as it will only be available for approximately a month. It is by far, my favorite Gaiman novel so far. I love Stardust and am eagerly awaiting The Graveyard Book, but if you haven't ever read him before, go in with an open mind and a sense of adventure. And remember, only the Gods are real...
