I'm a conference speaker and author myself (and no, I don't know John personally ;-)). I recently read this book while on train to/from a developer conference and there's just one word: excellent!If you need to understand how debuggers work and how to work through x86 assembly during debugging this book is for you! Even though I'm not a C/C++ programmer but instead concentrate on the .NET Framework using C#, I guess this book is one of the best I ever read - and .NET definitely doesn't make it obsolete in any way. And it's not only the information provided in this book but also the author's writing style which make it exceptional fun to read.Thanks for a great book!