It's been more than a year since the raid that killed Osama bin Laden, and now one of the Navy SEALS involved in the mission is causing a bit of a stir. The former servicemember has penned a book detailing the events surrounding the successful raid and the Pentagon believes it could contain classified information, The Associated Press reports.

The issue surrounding the inclusion of potentially-secretive information is largely tied to concerns about whether they could put military personnel at risk overseas. Pentagon press secretary George Little says there has been no decision made on whether to pursue criminal charges against the author, but he did hint that the allegations are very serious.

"When you have special operations units that perform these missions, there are tactics, techniques, and procedures, not to mention human life, that are in play," Little told the AP.

The book, No Easy Day, was written by former SEAL Matt Bissonnette under the pen name Mark Owen, and was released September 4. The controversy surrounding its release, and its subject matter, helped it debut at number one on, according to NPR.