This book is a testament both to the courage of Bob Gilliland and the ingenuity of Skunk Works at its height. Aviation historians and engineers will appreciate the story while the general public can respect a man’s mark on aviation. The book could have improved if it were more accessible to general readers and if it questioned why there hasn’t been a jet that was as groundbreaking since the SR-71. Nevertheless, the book provides a glimpse of the can-do attitude of the military-industrial complex leaving its readers to wonder whether we can once again scrape the heavens and push the limits of aerospace as Gilliland did nearly 60 years ago.