Lincoln's Birthday: 9 Essential Books On Our 16th President (PHOTOS, POLL)

It's Abraham Lincoln's birthday today, and to celebrate the life of our 16th president, we've collected some of the best, most essential books about Lincoln out there -- some recent, some less so. We've teamed up with Lincoln scholar Philip B. Kunhardt III, who is the author of a number of books about the president, most recently "Looking for Lincoln" and its companion "Lincoln, Life-Size". Kunhardt (the father of HuffPost Books Intern Jessie Kunhardt) sent us his favorites, along with his thoughts on each of the books, captioned below.

Which have you read? Any of these your favorites? Let us know, along with your own recommendations, in the comments below.