looks like this would be a great book for many startups to have.
The GV design team is a great group of guys. The team really get their hands dirty with portfolio companies. Here's a short video of when @jakek and @kowitz came down to visit us early on at Vungle and helped us out straight away about how to structure our website: http://youtu.be/Mnn4d43l8pI?t=1m45s
We also met up with @jazer a few months later.
Love the GV Design Sprint — I actually referenced it today in an accelerator class as a great use of "constraints" — how even companies with the resources of GV forces themselves to get the sprint done at startup speed. Can't wait to read :)
Hustle X