Programming Reactive Extensions and LINQ (Expert's Voice in .NET)

Reactive extension is quitea complex framework and I would assume if you start using it, you should already know LINQ. In this book author goes into great details about LINQ which and half a book is about it which in my opinion is a complete waist of time as the target audience will know LINQ.

Really not worth the money. The book itself is already brief (around 150 pages), if you take out the non-Rx content, then you have around 60 pages left.Out of the 60 pages, quite a few of them are just summary of MSDN documentation... Instead of reading this book, your time is better spent on going through the videos on channel 9.