Ab, Ab has the distinction of being Faulkner's best work but also his most difficult.

blacbird's advice is fine, but in my experience, As I Lay Dying pleases most crowds. Also, flipping through his collected stories--paying close attention to classics like "Barn Burning," "A Rose for Emily," "That Evening Sun" and a few others--is time well spent.

Small point (or perhaps not): because F always writes about the past living in and influencing the present, I'd suggest zombies are one of Faulkner's main subjects.