This book is worth a hundred self help books but is not one. It is one of the books I have probably mentioned at least once to all my friends and colleagues. (It seems I can be boring.) I gained valuable insights by reading this book, which is a gentle and thorough exposition into what people are attempting to escape from, and whether, by trying to do so, they will be happier. The book was inspired by an investigation by the authors into how to motivate long term prisoners to be more happy and less troublesome. The startling conclusion was that many such prisoners are reasonably happy and quite well behaved. Why this is is generalised by the authors into lessons for us all.