Having literary just finished reading this book, I thought I'd give my perspective as someone who has read his fair share of material relating to the space race of the 1960's-1970's.
To say I was exited upon hearing this book was soon to be published is something of an understatement. John W. Young's experience in manned space exploration is second to none, and it's all captured here in detail.
Is it a little heavy on the technical side of thing's...perhaps, but this was also the case with Mike Collin's `Carrying the fire' in this case mind I was expecting it as anyone who's ever heard of John Young's infamous `Youngrams' will know he is regarded as something of a stickler for details.
Does it contain mistakes...yes, but again anyone with enough knowledge on this subject should be able to spot them quite easily, and for me personally (even though their presence is indeed perplexing) they do not detract from the overall experience of the book.
What I like in reading such books (besides the historical reference) is to get a sense of the subject's personality and in this `Forever Young' does deliver. It is John Young's tenacity and determination that really shines through in the pages of this book.
Overall I really enjoyed this book, though the comparatively high level of technical detail means it's not as easily accessible as the likes of say Gene Cernan's `Last Man on the Moon' or Deke Slaytons `Deke' it still however manages to be an enjoyable and informative read and the epilogue is both inspiring and sobering in it's parting message.