Fredric Brown, who died way back in 1972 and is long out of print, was a science fiction pioneer and more importantly a major influence on other writers, myself included. In fact, no book has had a greater impact on me than WHAT MAD UNIVERSE (1949) when it comes to writing exciting pulp fiction. It's about a man named Keith Winton
And it's not just me. Brown was a major influence on the much more famous Phillip K. Dick, but where I find Dick almost unreadable, Brown's novels are light, breezy, fun page-turners full of mind bending ideas. Brown was also a dedicatee in Robert A. Heinlein's STRANGER IN A STRANGE LAND.
Sci-Fi not your thing? Brown also wrote detective novels and crime stories with equal aplomb. I truly hope this writer will someday be back in print and receive the recognition he deserves.
Fredric Brown's Wikipedia Page