I used to like Ray Bradbury's Fahrenheit 541 back when I first read it, but a fairly recent rereading left me slightly disappointed. I'd grown out of his style. I do not have many Bradbury books in my library, only two in fact, the aforementioned Fahrenheit 541 and an elderly edition (1961) of The October Country which I picked up in second hand bookshop in rural Victoria a couple of years ago.
Michael Bishop is another little known writer. I first discovered his writings in the collection Catacomb Years and although it is decades since I read the stories contained therein I remember being very impressed at the time. I also have No Enemy But Time which won the Nebula Award in 1982. Truth to tell I can't remember a thing about it.
Next Octavia Butler's Pattern Master.
I must admit I have read very few Jonathan Carroll books, but I do really love his book The Bones Of The Moon, and also like The Land Of Laughs.
And to finish off this entry, Harts Hope by Orson Scott Card. It does have a pretty cover.