Joy's Booklist
These are books that I have read and recommend. There are many other books that I've read and enjoyed, even by some of the same authors below, but these are my favorites.

Science Fiction/Fantasy

Adams, Douglas - Hitchhiker's Guide to the Galaxy
Asimov, Isaac - Foundation - original trilogy is excellent, later books aren't very good
Auel, Jean - Clan of the Cavebear - skip the sequels
Bear, Greg - Darwin's Radio
Bradbury, Ray - Something Wicked This Way Comes
Bujold, Lois McMaster - Falling Free, also the other books in the Miles Vorkosigan series
Card, Orson Scott - Speaker for the Dead - sequel to Ender's Game
Crichton, Michael - Prey
Heinlein, Robert - Have Spacesuit, Will Travel, also The Moon Is A Harsh Mistress
Martin, George R.R. - A Game of Thrones
Mckillip, Patricia A. - Riddlemaster of Hed
Modessit, Jr., L.E. - Recluse series of 13 books, earlier ones the best
Pratchett, Terry - Men at Arms, Eric, Equal Rites - humorous, but very cynical
Stephenson, Neal - Quicksilver - first in Baroque Cycle trilogy
Tolkien, J.R.R. - The Lord of the Rings
Willis, Connie - Doomsday Book

Fiction

Card, Orson Scott - Sarah, also Rebekah, and Rachel and Leah - novels based on the women of Genesis
Grisham, John - The Pelican Brief, and The Client
O'Brien, Michael D. - Sophia House
 

Biography/Autobiography

Merton, Thomas - The Seven Storey Mountain
St. Therese of Lisieux - A Story of a Soul
Twain, Mark - Joan of Arc
 

Nonfiction

Lewis, C.S. - Mere Christianity
Lewis, Michael - Moneyball: The Art of Winning an Unfair Game
 

Classics

Alcott, Louisa May - Little Women
Bronte, Charlotte - Jane Eyre
Dickens, Charles - A Tale of Two Cities
Dumas, Alexander - The Three Musketeers
Lewis, C.S. - The Lion, the Witch, and the Wardrobe (children's)
Lewis, C.S. - The Screwtape Letters
London, Jack - The Call of the Wild
Twain, Mark - The Adventures of Huckleberry Finn