Very detailed and well constructed. It is the definitive guide on the new concurrency package and ways of designing concurrency system. Personally, I think the new concurrency in Java is over the top and quite overwhelming but this book does it justice.
Not quite in the league of Kenzo power as some reviewers claimed. It is strong scent and long lasting. It can be worn anytime of the day but probably not best on a very hot day in my opinion. Good value for money.