The Only Skill that Matters, by Jonathan Levi, is a book that covers a number of techniques for learning.
Personally there was very little I learned from the book – but I had already watched his course on the subject, plus others, and I just read UltraLearning , which covers several parts of the subject.
That said, I think the book would be very adequate for those new to the subjects of memorization, speed reading and how to learn. Plus, it is quite short, and reasonably priced.