Just amazing. This is THE book to read on the early days of the Apollo program, hands down. Collins states up front that he doesn't believe in ghost-writers, and his intention is to spell out the science involved in getting man into orbit and to the moon and back in terms that a layman can understand, and furthermore, in such a way that there would be enough of interest on every page to keep the reader going forward. He did just that, and more. An amazing read that I cannot recommend enough.