An enjoyable and enlightening read, but the repetition becomes a little tedious. I learned some new things, even as a former "expert" in this field; hAn enjoyable and enlightening read, but the repetition becomes a little tedious. I learned some new things, even as a former "expert" in this field; however, some of the facts mentioned in the book are completely unverifiable, or at least I've failed to find them online. I've tweeted the author to ask questions (like, where did he get the word "stickiction?" What does it mean? His book is the only instance of it found. What chemical did Blue Origin replace with citric acid?), but not received any answers, yet....more