This is one book which can cater for any section of software development work force (school/high school or undergraduate or graduate or instructor or software rofessional). The book is aptly organized and have a upbeat flow of information from beginning to ending. I would say any performance test engineer should read this book before submitting a performance test plan for any application. I would say any software developer should read this book before designing any feature. With my 14 years of experience API profiling is most over looked or given least attention in the initial design and people do patch up at end of the release. The chapter on API profiling framework should be eye opener for many brains. Amdahl's law and the case study speaks volume about the author and his experience. Effective optimization and tuning techniques can be a very handy especially for applications which are years old and still exist. Overall it was a complete quantitative, qualitative, practical approach to performance and scalability. I highly recommend this book to anyone who is serious about performance and scalability. - Bala (Bangalore, India).