AP Photo/Adam Bird
Sarah Palin's bus waits in front of Barnes and Nobles during the first stop of her book tour in Grand Rapids, Mich., on Wednesday, Nov. 18, 2009.
AP Photo/Adam Bird
A fan of Sarah Palin holds onto her book while waiting to get it signed by during the first stop of Palins book tour in Grand Rapids, Mich., on Wednesday, Nov. 18, 2009.
AP Photo/Adam Bird
Fans wait to meet Sarah Palin during an autograph session at Barnes and Nobles during the first stop of her book tour in Grand Rapids, Mich., on Wednesday, Nov. 18, 2009.
AP Photo
Todd Shaffer, 38, of East Lansing, Mich., in foreground, waits in line with hundreds of people at a Barnes and Noble bookstore on Nov. 18, 2009, for a wristband that would give them a chance to have Sarah Palin sign their copies of her new book, "Going Rogue," at a book signing that evening in Grand Rapids, Mich.
AP Photo/Adam Bird
Sarah Palin signs her autograph at Barnes and Nobles during the first stop of her book tour in Grand Rapids, Mich. on Wednesday, Nov. 18, 2009.
AP Photo/Tom Uhlman
Former Alaska Gov. Sarah Palin waves to the crowd during a book signing appearance for her autobiography, "Going Rogue," at Joseph-Beth Booksellers in in Norwood, Ohio, on Nov. 20, 2009.
AP Photo/Tom Uhlman
Cindy Bueler, left, stands with Paul Johnson, who is dressed in a historic military costume, as they wait to get their books signed by former Alaska Gov. Sarah Palin at Joseph-Beth Booksellers in in Norwood, Ohio, Nov. 20, 2009.
AP Photo/Keith Srakocic
Crowds waiting in line to have Sarah Palin sign her book "Going Rogue", hold up copies of the book for television crews at a book signing at the Sam's Club warehouse store in Washington, Pa., Saturday, Nov. 21, 2009.
AP Photo/Keith Srakocic
A woman in the crowd wears a Palin 2012 shirt while waiting in line to have Sarah Palin sign her book "Going Rogue" at a book signing at the Sam's Club warehouse store in Washington, Pa., Saturday, Nov. 21, 2009.
AP Photo/Keith Srakocic
Crowds wait in line to have Sarah Palin sign her book "Going Rogue" at a book signing at the Sam's Club warehouse store in Washington, Pa., Saturday, Nov. 21, 2009.
AP Photo/Keith Srakocic
Sarah Palin, right, signs her book "Going Rogue" at a book signing at the Sam's Club warehouse store in Washington, Pa., Saturday, Nov. 21, 2009.
AP Photo/Keith Srakocic
Sarah Palin signs her book "Going Rogue" at a book signing at the Sam's Club warehouse store in Washington, Pa., Saturday, Nov. 21, 2009.
AP Photo/Don Heupel
Protesters line up for the Sarah Palin book-signing event in Henrietta, N.Y., Saturday, Nov. 21, 2009.
AP Photo/Don Heupel
Hundreds of customers line up for the Sarah Palin book-signing event in Henrietta, N.Y., Saturday, Nov. 21, 2009.
AP Photo/Don Heupel
Sarah Palin interacts with a customer during a book-signing event in Henrietta, N.Y., Saturday, Nov. 21, 2009. Henrietta is a suburb of Rochester, N.Y.
AP Photo/Don Petersen
Sarah Palin buttons are seen for sale outside a Barnes & Noble book store where Palin was autographing books during a book tour stop in Roanoke, Va., Sunday, Nov. 22, 2009.
AP Photo/Don Petersen
Sarah Palin talks to a young fan while at a book tour stop in Roanoke, Va., Sunday, Nov. 22, 2009.
AP Photo/Don Petersen
Barbara Epperly of Radford, Va, celebrates after Sarah Palin signed her books at a book tour stop at Barnes & Noble Book Store in Roanoke, Va., Sunday, Nov. 22, 2009.