Functional Programming in Scala. It's not a book about scala, it just so happens to use scala as the language to teach you how to program functionally. I've r

Functional Programming in Scala. It's not a book about scala, it just so happens to use scala as the language to teach you how to program functionally. I've read other books that purport to do the same, they end up showing a light sprinkling of functional concepts. This book goes much deeper, and is ultimately much more rewarding.