Very interesting book on how to develop more sound business models. I like the non traditional pedagogical approach that has been chosen by the authors (more graphic and pragmatic than theoric). Definitely worth your money if you're interested in entrepreneurship and/or innovation.
I've been a Halo fan since the first episode and this one still does the trick for me. I found the solo mode to be more compelling than let's say Halo3 for example. And the multi is just crazy and adds an incredible amount of replay value.
My 2nd book from Brad Feld after Venture Deals. It's a very interesting book on relationships and how to succeed in them in the long term. Not all is relevant (some insights are rather quite obvious) but nonetheless most of the conclusions put forward are important to bear in mind.