"No Easy Day" was due out on Sept. 11, but Dutton announced the book would be available a week early on Sept. 4 because of a surge of orders due to advance publicity that drove the book to the top of the Amazon.com and BarnesandNoble.com best-seller lists.
The Pentagon on Wednesday said it has obtained a copy of the book and is reviewing it. The book was not cleared by U.S. defense officials in advance, raising the possibility that the author could face an investigation and possible criminal prosecution.
"We have obtained a copy and are reviewing it," Pentagon spokesman Bryan Whitman told Reuters.
The Associated Press purchased a copy of the book Tuesday.
In another possibly uncomfortable revelation for U.S. officials who say bin Laden's body was treated with dignity before being given a full Muslim burial at sea, the author reveals that in the cramped helicopter flight out of the compound, one of the SEALs named "Walt" was sitting on bin Laden's chest as the body lay at the author's feet in the middle of the cabin.
Bissonnette also writes disparagingly that none of the SEALs were fans of President Barack Obama and knew that his administration would take credit for ordering the May 2011 raid. One of the SEALs said after the mission that they had just gotten Obama re-elected by carrying out the raid.