"Bad Astronomy" - Philip Plait. A handy guide to what you're wrong about, if you ever think about astronomy or space at all.
"The Place Of Dead Roads" - William Burroughs. A kaleidoscope of spaghetti-western, social commentary, dark magic, science fiction, and above all a fucking good read. More coherent than "Naked Lunch", but still pretty delirious at times.
"Schaum's Outlines UML" - Simon Bennett, John Skelton, Ken Lunn. Without which I would have flunked out of uni a long time ago.
"The Iliad" - Homer (as translated by Robert Chapman). Like all the best "literary" works, it takes a very visceral subject and turns it into something timeless and beautiful. This is what I call "a poem".
"The Pendragon Cycle" and "Song Of Albion" - Stephen Lawhead. A very absorbing pair of fantasies, made all the better for the fact that they're both set in Britain (well, Song Of Albion is set in the "Celtic archetype" of a parallel dimension, but what it boils down to is: A much larger version of Britain).
All of Brian Jacques's Redwall books, which were what I grew up reading, and which I still have. OK, they're teen fantasy novels and not the best literature on Earth, but they gave me many happy hours back in the day.