I have read over 50 autobiographies/memoirs in the last several years and I have to say that this is one of the best that I have read, very well researched and organized. Anyone who is interested in the space program will find this book fascinating. On the other hand, the personal life of John Glenn, like his 50+ years marriage to his wife, is a love story (He met his wife in a playpen when they were toddlers). His courage and perseverance certainly contributed to his success. Two more autobiographies that I have read that share the same vision and determination to success are Georg Solti - A Memoir (world reowned conductor) and Salvatore Ferragamo - Shoemaker of dreams (Italian shoe designer). Both of these I considered them very well written and interesting.