$0 - The amount that Bristol Palin was charging fans for an autographed copy of her memoir "Not Afraid of Life -- My Journey So Far" if they were among the first 100 people to attend her book signing Saturday morning at Dupont Circle's Books-A-Million. (She appeared with ghost writer Nancy French). Event organizers posted an advertisement to Craigslist Tuesday in an attempt to entice fans to attend the event. Bristol Palin was in town supporting her mother Sarah, who was the keynote speaker at CPAC Saturday afternoon. Sarah Palin also celebrated her birthday that day. Willow Palin was also in town, but not Todd Palin, who remained back in Alaska prepping for the 2012 Iron Dog snowmobile race.