One slight puzzle about this book: it was clearly written by God (and is sold as such on Amazon), so why would God adopt the unconvincing pen-name 'David Javerbaum'? This fools nobody. Come on, God, don't be shy - you've written an entertaining book for once (it was about time - the Old and New Testaments have their points, but they really aren't all that funny), so don't hide behind a feeble pseudonym. Be a man (you did it once, you can do it again), and stand up and be counted (one, two, three; yes, there are three of this author, count them). And remember, when it comes to those signing sessions, 'God' is going to be a lot quicker to write than 'David Javerbaum'.
Where was I?
Oh yes. This is an entertaining book, which lets you in on the real stuff that didn't get into the Book of Genesis. It's light (I can almost hear its author saying, 'Let it be light'; and it was light), and very funny in places, and even when it isn't very funny, it's quite funny. And it's short, which is good. The OT and the NT, as I say, have their points, but they do go on a bit. God-as-David-Javerbaum is more succinct, and a good thing too.
Give this book a try. It won't take long, and it may make you laugh. And buying it will put you in God's good books, which has to be a good thing. After all, you don't want to suffer the same fate that awaits Charles Darwin and all those other evolutionists, do you? (You can read about that at the end of chapter 3.)
Nice one, God. Keep up the good work.