I recommend adding Traction (http://tbook.us) to the book list (and possibly removing Gladwell -- Traction is much more helpful if you're starting a company).
Cool, I'll check it out and put it on my list! I've read all the books on the current list, that was sort of my starting point. I think I use almost everything on the site, with the exception of a few tools. Some of the books don't necessarily pertain to startups, but I felt they had value in the message they were delivering. Outliers is generally loved/hated and, while the science behind his data is lacking, I still like the message of hope and perseverance it delivers. Thanks for the suggestion though! Keep them coming!