What book, in addition to the Bible, do you most want to read this year?

I think I have managed to deal with this one already thanks to Katrina's Fall into Reading challenge. I haven't progressed very far though so I will need to get cracking... I'm finding the accountability very helpful though, so I will have to reconsider this question in the New Year once this challenge is over. I have found an interesting site from Christianity Today that I might use to help me pick next year's books: The Top 50 Books That Have Shaped Evangelicals

Be as careful of the books you read as of the company you keep, for your habits and character will be as much influenced by the former as the latter.
Edwin Paxton Hood, English clergyman (1820-1885)