The author sides with the reader right away. He knows his audience. People who have no problem flying aren't likely to buy this book. Thankfully for the author, 1 out of 3, as he points out, have some form of anxiety about being 40,000 feet above ground in a steel tube.
By far the most useful section of the book deals with turbulence. This chapter is basically a physics lesson made simple. In short, he explains how a little movement by the plane results in the sensation of a large movement. He even explains how air pockets don't exist.
There is also plenty of information on every part of a plane flight, from pre-take off to landing. I actually read the along with the book during a recent flight. The only thing scary about that flight was how bang-on he was.
The book delves into other flight fear oriented subjects. This includes a chapter on media obsession with plane crashes.
This book has been printed in easy "carry on" size. I highly recommend white-knuckle types to take it on the plane. As soon as you hit turbulence, you'll feel like it's the smoothest flight you've ever been on!