Funnily enough I was watching a ZP episode when I saw this and started reading it.
I don't think that this is a great idea though. I'm probably going to read it at some point, but I don't expect it to be an especially good book.
Actually it's a bit surprising to me that this book will be published since Yahtzee is famously pessimistic towards the intelligence of mankind, and only the intelligent portion of his audience will read this. Croshaw is almost certainly a complete unknown outside of the internet, so any people who don't hang out on the internet (and thus the primary audience for this and any other book) aren't going to know who this asshole is or what "author of Zero Punctuation" means.