This book is so far one of the best technical books, I've ever had. The material is so well presented and organized, that it is hard to find in any other books. The author has presented the material with clarity, conciseness and problems that logically follow the material. It is a very good material for mechanical engineers preparing in Machine Design portion of PE exam. I hope the author has in mind to create books like this for ohter mechanical engineering related disciplines, like thermo and fluids. I'd say this is a must book for every single mechanical engineer.