His book took me by surprise. I expected it to have the same style and sort of content as his blog (like every other blogger who writes a book) but it was completely different. It consists of half a dozen (unrelated) chapters that end with an exercise. I'm not sure if Tempo is any good (I suspect his solutions overfit the data) but it's short (130 pages or so) so there's no reason not to pick it up if you like the way Venkat thinks.

I'm taking the liberty of adjusting your estimate of wanting to buy the book upwards to 30%.