The only question I have unanswered is what the name of the game was that Elon Musk sold when he was 12. I had to include Blastar, Blast Star, and Blaster. I tried to ask that question on Twitter, but it got lost in the spam...

@alanctgardner2 I meant questions that will improve the material I have. You can always ask more questions, but I didn't want the book to be too long either. Well, I wrote it because he's an engineer and it's hard to find engineers that are role models, and I wrote it because he cares about peak oil and not so many others do.