A.J. Jacobs is an author, journalist, and contributing writer for Esquire. His latest book "It's All Relative: Adventures Up and Down the World's Family Tree" chronicles Jacobs's three-year journey to help build the biggest family tree in history. In this week’s Bookmarks, we give you a special look inside the book with an excerpt read by A.J. Jacobs himself. Later this week, you can hear author Amy Bloom talk about her latest book "White Houses." Stay tuned for a sneak peek in this week's Bookmark