Almost any book by John J. Nance - well-written aviation-centered thrillers.
Roger Zelazny - any book by him you can get a hold on. If you like fantasy, you will love these books.
Robert Sheckley - once an opponent of the "new wave" in sci-fi, eventually dabbled into mixing sci-fi with fantasy himself.
Ursula LeGuin - "A Wizard of Earthsea" and "The Left Hand of Darkness"
Studs Terkel - "The 'Good' War"
James Oldridge - "The Hunter" and "The last inch"
Dean Koontz - "Lightning"