Firstly, let me say that I respect Sam's achievements in brewing and applaud his creativity. I'm looking forward to more "extreme" offerings from Dogfish Head in the future. Unfortunately, my regard for this book does not match that of the author. It's really a bit of a mess. In trying to appeal to beginner and experienced brewer alike, I think it fails to satisfy either. The title would lead the consumer to believe that this is a guide for brewers (enthusiasts) to kick their brewing knowledge and techniques up a notch. However, the first sections of the book are an uninspired description of the extract brewing process, barely detailed enough for a beginning brewer. The book then describes how and when to use extreme brewing ingredients (non-traditional sugars, spices, herbs, etc). This is by far the most interesting part of the book, but is more applicable to an experienced brewer. The book then concludes with an extract/partial mash recipe section leaving us all-grain brewers hanging out in the breeze. Next time Sam, pick an audience and stick to it throughout the book.