John Norman's books of life on Gor; but good luck trying to find the paperbacks in what passes for bookstores nowadays. Norman's books are definitely NOT "politically correct". Here are a few links to give you a feeling for what he's about...
Sandor's Homepage
The Encyclopedia of Gor
Dragon Works' Gor War Homepage
Learn The Game (Kaissa) at Sir Midian's Leather Dungeon
And you'll find everything your slave might require at Stormy Leather
Larry Niven and Jerry Pournelle collaborations
Patric O'Brian, author of the Jack Aubrey nautical dramas
Books for entrepreneurs
Rafael Agayo: Dr. Deming The American Who Taught the Japanese About Quality
Roger E. Axtell, editor: Do's and Taboos Around The World
Louis E. Boone & David L. Kurtz: Marketing
Leon Danco: Beyond Survival: A Business Owner's Guide for Success
Alfred H. Hausrath: Venture Simulation In War, Business and Politics
Yukio Mishima: The Way of The Samurai
Miyamoto Musashi The Book of Five Rings
Tom Peters: Thriving On Chaos
Sun Tzu: The Art of War
Wang Xuanming: 100 Strategies of War
Comics
Albedo Anthropomorphics
Appleseed
Bondage Fairies
Cherry
Hard Boiled by Frank Miller
Mighty Tiny, an outstanding limited series about the time, after Man is but a memory, when mice rule the world.
Nausicaa of the Valley of Wind
Anything by Kirby or Steranko. As for new stuff: Kirby's got an excuse: he's dead. But Steranko, whom I consider the greatest living comic illustrator (and comic author for that matter) hasn't done a thing for twenty years. What's wrong with this picture??