The scope of the book is truly encyclopaedic...Pruss's book is an excellent summary of arguments for and against Principle of Sufficient Reason, and will provide much food for thought for philosophers of many different persuasions.
- Kevin Davey, University of Chicago, Religious Studies
"This is a masterly treatment of the Principle of Sufficient Reason in a multitude of its philosophical guises and contexts...the book is an excellent achievement, and I can think of no sufficient reason why it should not grace the shelves of any philosopher." --Dean Rickles, University of Calgary: Philosophy in Review
The Principle of Sufficient Reason (PSR) says that all contingent facts must have explanation. In this 2006 volume, which was the first on the topic in the English language in nearly half a century, Alexander Pruss examines the substantive philosophical issues raised by the Principle of Sufficient Reason.