the book is not for beginners , and i did not know this fact until reading the book , for me the book was like davinci code until i google for ajax and rest implementation tutorials , after awhile the picture get clearer , and the book works well for me , and what's interesting about the material is the focus on test driven development , unit testing and building , i recommend it for who already familiar with ajax and rest architecture implementation and had his hands dirty with ajax/rest project before and want to solva the architecture problems .