My wife checked this out from the library and loves it. So before buying the e-book version I downloaded the sample. In that small number of pages there is a missing figure and another figure mislabeled (the caption appears to be from the missing photo). That discouraged me from buying. Publishers need to get serious about the quality of their electronic versions. (And iBooks Author should be the standard for cookbooks in general).

If you are a cookbook collector, the type that buys big, glossy collections of recipes featuring dozens of full page pictures of food, then this book may not necessarily be for you. If, however, you want to really learn how to cook, cook properly, and understand what you're doing, then you shouldn't hesitate to buy this book. Ratio reads much more like Alton Brown's Good Eats than Rachel Ray, in that instead of getting direct instructions from point A to point B, you're given a map so that you can properly place yourself and better understand the interconnected nature of cooking. I've given this book to five or six people that I know enjoy cooking, and all of them have read it cover to cover and found that it really improved their understanding of what they cook.