This is an excellent book if you want to understand a bullet's flight and become a better shot at long range, like Camp Perry or in F Class matches. It contains a complete course in external ballistics written in plain English. The layman can understand it; there are some equations included but you do not have to be a mathematician to understand his explanations. Bryan includes a disc with a computer program that will do all the calculations for you, so you do not have to be a programmer to use what he teaches either.
What I find most about the book is that it is well laid out. It starts out with a solid introduction and then devotes a well-written explanation of each factor affecting a bullet's flight in its own chapter. Again, the explanations are easily understood, and not just by an engineer or physicist.
To top it off, Bryan includes actual test data for widely used bullets for long range shooting. This is test data, not data made up to enhance a product's sales. You can use it to help make a better selection of the bullet you need for the shooting you plan to excel at. And, this data is on the disc along with the program.
All in all, I highly recommend this book for anyone aspiring to shoot at long range.