Ed was truely someone who loved cycling, sports medicine, and science. He died riding a few years ago and I hope that when I go I am also doing something that I love.
I have previous editions of this book and several of Ed's other books. I used to be confused about seat height, until I read Ed's collection of data from various studies on the topic. I now keep my road bike saddle at 109% of my inseam (w/shoes), my touring/CX bike at 105%, and my mountain bike at 100-105% depending on whether I am climbing or decending most.
He collects data from around the world, and includes data from his own research. Ed repeats various data across some of his books, but you wont mind, its all good, and relevant. Ed references work by Chris Carmichael (Lance's coach), Steve Hed, Leonard Zinn, Greg LeMond, various sports doctors and researchers, and various expert cyclists. He covers nutrition, hydration, aerodynamics, seat height, geometry, training plans, weight training & cross training, periodization, etc.
Some of the information is non-conclusive - Ed gives the data in a way that allows you to determine what is the best choice for your types of riding, but many times the 'best' choice is so obvious you are not confused or left hanging (like SO MANY other bike books do).