I have to quote from another review here- from an Apollo program engineer:"I finally gave up listing the errors I found in this book" I concur. This book is (to quote the hospital tech in the film "The Right Stuff", "...b-a-d, BAD". While I was exposed to Apollo program engineering as a youth, my era of engineering experience is after the fact, but being an American spaceflight historian and a believer in either being accurate (otherwise, why bother?) or at the least show the attempt(!) this one is just not good- full of supposition, and statistics that can be verified if one makes the attempt. Get "First Man" by James Hansen- it's the authorized bio of Neil A. and is cool (for me anyway) in that he even takes the reader back generations leading up to the creation of a truly heroic human.