6th Sense Analytics is running an advertising campaign with one of my favorite books. :)
When you sign up for a relevant trade magazine at Trade Pub, you'll get a shot at a free PDF copy of Ship It! Apparently it's a 'luck of the draw' shot. We're one of many promos running.
Some of the better known magazines involved at EWeek and CIO Insight, but there are many other titles available.
Enjoy and good luck!
By the way... a number of readers have gone to the 6th Sense Analytics web site looking for a promo to sign up for... it's not there. :) Visit Trade Pubs. I'm told your best bet is to hit the IT Software and Development category. Good luck!