Rohwer and Skrocki's Contracts in a Nutshell is a succinct summary of the fundamentals of contracts. Contains expert coverage on forming contracts, restitution, statute of frauds, contract interpretation, and modification. Also discusses remedies, performance, and third-party beneficiaries.
I've read this book and will re-read it soon to prepare for the baby bar. Like the others in this series it's good for me because it starts with concepts and builds upon them which is better for me than wrote memorization like the Gilbert's Law Summaries which are also very usefull. Of course not a primary source of information, as per the books intro.