TAKE MY MONEY.
Seriously though, thanks for providing me something to read on the subway.
PS: Is that Gotham Rounded?
P.S.: The WhatFont extension is your friend :) http://chengyinliu.com/whatfont.html
You should put a Gift option on the site (as a nudge nudge), I know plenty o designer friends that will find your book helpful and at 3/6 bucks, I'll gladly gift a few!