I was browsing my local bookstore last night before catching a movie and as always, I checkout the computer section to see if there are any new books out. I started flipping through several new books on Adwords and noticed several had vouchers for free $25 coupons. The activation codes were in plan view. No need to tamper with anything. Just write down the code and the URL to activate and you have a free $25. Great for testing new markets or keywords.