Ringworld and it's sequels, by Larry Niven, all his
Known Space short stories and novels. Hell, just about anything from him. I really enjoyed his work with Jerry Pournelle in
The Mote in God's Eye and
Footfall. He is my favorite sci-fi author, and I am currently reading
Destiny's Road, thanks to a heads up from Chip, thanks Chip.
In His Own Write & a Spaniard in the Works, John Lennon.
The
Xanth series, Piers Anthony.
The Screwtape Letters, C.S. Lewis.
Bartleby the Scrivener and many other works by Herman Melville. I really enjoyed the short story
Benito Cereno, murder mystery at sea!
Everything by Carl Sagan.
The Universe in a Nutshell, Stephen Hawking.
The Metamorphosis, Franz Kafka. Had a profound effect on me as a youth.
A day in the Life of Ivan Denisovich, Alexander Solzhenitsyn.
To Kill a Mockingbird, Nelle Harper Lee
The Catcher in the Rye, J.D. Salinger.
Many novels and short stories by Stephen King, but certainly not all of them.
Goodbye my Lady, James Street - A tear jerker to be sure, both the book and the Walter Brennan movie.
Fantastic Voyage and
Are We Spiritual Machines?, Ray Kurzweil.
Childhood's End, Arthur C. Clarke.
2001: A Space Odyssey, good movie, GREAT book!
The Jungle and
The Metropolis, Upton Sinclair.
The Jungle inspired Theodore Roosevelt to order an investigation into meat packing industry.Teddy was quoted as saying,
"radical action must be taken to do away with the efforts of arrogant and selfish greed on the part of the capitalist." after reading
The Jungle. Pretty influential stuff. Sinclair also founded a socialist experimental community called
Helicon, which burned down before it really had a chance to get started.
Ethan Frome, by Edith Wharton. Classic forbidden love tragedy.
Many short stories and novels by Ernest Hemingway.
The Three Day Blow and
The Old Man and the Sea come to mind immediately.
1984 and
Animal Farm, George Orwell.
Pygmalion, George Bernard Shaw.
The Great Gatsby, F. Scott Fitzgerald, my hometown hero!
The Fountainhead (currently reading),
Anthem, and
Atlas Shrugged, Ayn Rand. What a great story her life is.
A Canticle for Liebowitz, Walter M. Miller. Fascinating sci-fi classic.
One Flew Over the Cuckoo's Nest, Ken Kesey, what can I say? Great movie, absoultely brilliant book. McMurphy's role was made for Jack...
Crime and Punishment, Fyodor Dostoyevsky. Long, yet fascinating and enlightening.

All the works of Tolkien. I devoured them during my youth. Without him, I think the fantasy genre would not be anywhere near where it is today. Same goes for Lewis Carroll, C.S. Lewis, and the rest of the grand daddys of the genre.
Slaughterhouse-Five, Kurt Vonnegut Jr. Bizarre yet captivating plot line.
Anne Rice's books, because I need a good Vampire story now and then.
Mainstreet and
Arrowsmith, Sinclair Lewis. Another home town author I really like.
Mainstreet is brilliant.
Cannery Row,
A Day No Pigs Would Die, and others by John Steinbeck. He was a master.
The Call of the Wild,
White Fang, and other works by Jack London. He kept my brain busy in my pre-teen years.
A Brain for all Seasons, William H. Calvin. Did dramatic climate changes in human history determine the evolutionary path of the human brain? Absolutely fascinating.
Chariots of the Gods?, and its sequels, Erich Von Daniken. A little absurd at times, never the less, drove my imagination and still makes me think to this day; where did we come from, and what is out there?
The Electric Kool-Aid Acid Test, Tom Wolfe. Read this during my experimentation with drugs days. Was a prerequisite, or so I was told. I read my parents Book Club copy. They didn't read it, and I don't think they had any idea what it was about...

I also read Hunter S. Thompson and Timothy Leary at this time. I tried to anyway

Everything by Mark Twain. The original curmudgeon. Hell, he even made it into Star Trek!
A History of Pagan Europe, Prudence Jones and Nigel Pennick. Great stuff. So many things that I had no idea about, yet makes absolute sense when contrasted with what they taught us in school and in church...
Uncle John's Bathroom Readers, someone mentioned it above and I must concur. I buy my parents one of these just about every year. More trivia than a game show host reunion!
Oh! I forgot dictionaries. I guess that makes me an uber geek.

I could go on and bore you all more than you already are, but this is too long of a list as it is.
Thanks to everyone who replied here for adding a couple more pages to my "To Read" list.
