What I really want is a book dedicated to type-level wankery in Scala. That's the part of the language that's not easy and requires a lot of trial and error to figure out on your own.
This is EXACTLY how I feel. I don't need a lot of introductory chapters dedicated to first-class functions, closures, and higher order functions like map/fold & friends. So much Scala material is clearly targeted at Java programmers and leads with something like "look no semicolons!" I want something like "Scala for Lispers". (or even "Scala for Ruby programmers")