This Nutshell's organization follows the Cases and Materials on Patent Law, Second Edition casebook by Adelman, Rader, Thomas, and Wegner. If you are using this casebook, then the Nutshell is a no-brainer purchase. Where the Nutshell is organized differently (Chapter 1 Foundations of Patent Law and in a more general way towards the end of book on infringement, defenses, remedies, etc.), I actually liked its organization better than the casebook. The Nutshell even has a passable index, as opposed to the atrocious index in the casebook. The best part is that the Nutshell is new enough that KSR is discussed in many appropriate places, and the discussion does not feel added on at the last minute.

This book will not make you a patent law expert, but it will help you learn some nuances of patent law.

Similar to the other patent law supplements out there, but more recent. Rader is an author, which gives the book a unique perspective in some parts. Keep the title in mind ("nutshell") - the book gives a good, basic overview of the topics that is very helpful in understanding the more complex course material.