Great book. I read it a few months ago.
During the onset of the Benghazi clusterfuck, I couldnt help but recall the sentiments of a Marine reconnaissance man which were expressed to author Evan Wright in the book "Generation Kill": those who can't kill will always be subject to those who can.
Basically, the only reason why the Benghazi CIA GRS personnel even saved the lives of the DSS agents and unarmed TCN security guards at the diplomatic compound was a result of taking initiative and being armed. Bob, the CIA Annex station chief, was powerless to 1) stop the CIA GRS team from assaulting the dip. compound, and later 2) resist the orders of the GRS staff from boarding the evac plane because armed dudes aren't weren't taking no for an answer. This book did an outstanding job of cementing the morality of modern warriors, that is trusting your instinct
But yeah, to answer your question, Michael Bay (yuck) directed the movie which is largely based off this book.
p.s. a Big FUCK YOU to the "Americans" who entrusted QRF capabilities to proven unreliable locals, who ignored additional security requests from Amb. Stevens himself, who grossly misused ISR assets (a fucking Call of Duty playing kid couldve manned the overhead MQ-1 Predator and glassed targets for the GRS/DSS Annex defenders BEFORE those mortars cooked off), who repeatedly told Bob to have his team stand down, and in general responsible for that clusterfuck..