If you want the definitive account of Kelly Johnson's life - this is the book. If you're looking for detailed technical information on the various aircraft he designed, look elsewhere. In my opinion this is the only real problem with this book - there are not enough details. Too many subjects that should warrant complete chapters are only mentioned in passing. This book would have to be over 1,000 pages to really do justice to Kelly Johnson's achievements. It's too bad that this book was written before the major declassification reviews of the past several years. With the passing of Kelly and Ben Rich, many interesting details have been lost forever.