Last sentence of the first chapter: "However, John Glenn's first footsteps on the moon show that there is still potential for human exploration..."
John Glenn? An editor should have picked up on that, especially considering the moon landing was, likely, the most notable event of the last century. Such a glaring mistake makes one suspect every other fact in the book. Had I read that line before I bought it at the store, I would have placed the book back on the shelf.
Decent introduction otherwise, but, again, I am suspicious.