[DarkTree]

I actually find Amazon to be pretty amazing at discovery, but it's dependent on the "Customers who bought this item also bought" section under a book I know I like or am interested in.

I don't go to Amazon books just to start browsing aimlessly, but if I am yearning for a book in the same vein as another book I liked, I'll just search that book and look through the books suggested below. It does keep my discovery narrow, but that consequently keeps my reading wish list small and wieldy.