actually, everything he has written. As I said, he's an entertaining author much like Ray Bradbury, Frank Herbert, Larry Niven, and other small-minded buffoons. And there were far too few of those when I was growing up for me to pass them by. I used to hunt down old analogue magazines just to read the good old stuff.
Speaking of authors of whom I've read every word, Rodger Zelazny needs a hell of a lot more movie time. 9 princes in amber, jack of shadows, changeling trilogy, and damn near all of his scifi stories (man, This Immortal! Lord of Light!) ... wow, if there is a more unexploited scifi moneymaker than him I'd be shocked.