In contrast to the list of top books every woman has read, I've only read 9 from the similar list for men as compiled by Esquire. Unfortunately, they published their list in a very annoying format so you have to flip through this whole slide show thing to see their whole list. You can find it here, if you're so inclined.
Again, what makes these books essential for men? I did see a lot of books about war and/or naked women. Is that all? Can it be that simple?