His best known book is The Last Unicorn, which is great. I like Giant Bones too, and I have a book of his early stories and some non-fiction he wrote, called The Rhinoceros Who Quoted Nietzsche...and other odd acquaintances. I love the way he writes, and I like the way he makes the words sound as much as the stories he tells. I can see what he writes, and feel like I'm there, more than most authors. It isn't a style that fits every story, but I would love to be able to write like he does.
For some reason, I like to just... find his books. Not order them, like I do everyone else's. But I'll look for him in every bookstore I visit, to see if they have anything I don't. Odd, maybe, but it seems... appropriate.