that book is about how to crack the code. The most detailed way than had been done ever before, the authors talk about the highly technology of attacks and hacking code. The book is filled with examples of real code exploits and fixes introduced by hackers in popular applications. Readers demonstrates how to identify unknown vulnerabilities in the software and how to use them to break into computers. The book is intended for professionals in the field of software and can be used as a guide to create more secure code.