It’s temporarily out of order.
Amazon says place your order and it will be filled as soon as they have more.
BARNES & NOBLE, AMAZON.COM AND ANY OTHER BOOKSTORE WILL NOT HAVE THE BOOK UNTIL IPAGE UPDATES
"..book seller cannot place orders until Ingram's iPage updates and as I explained a couple of weeks ago, that can take 1 to 3 weeks."
Many people pre-ordered the book from Sinclair; those began shipping out last week.