A while back, I gave a preview of the rather impressive The Art of the Mass Effect Universe book that was recently published by Dark Horse Comics. Well, now it seems that if you purchase the digital version of the book through Digital.DarkHorse.com, you'll receive a code to unlock a Reinforcement Pack for co-op play on your PC or Xbox 360 copy of Mass Effect 3. (Guess the PS3 owners get shafted here.) You can also get the Reinforcement Pack if you buy the digital version of the four-issue mini-series Mass Effect: Invasion.
The Reinforcement Pack contains various character boosts including the powerful Collector Assault Rifle. I'm just sorry that they're not offering the code with physical copies of the book, because while I don't mind reading comics or print books in digital format, when it comes to a nice art book, I much prefer it to be a real, live book.