Back Blast by Mark Greaney

Returning to Washington to uncover the truth about why the CIA betrayed him, former elite agent-turned-Gray Man Court Gentry discovers that the case is still very much under discussion and that he has stumbled onto a secret that powerful enemies will kill to keep.

This was the best novel in the series.

NO SPOILERS
Your questions will be answered. Your mind may be blown. Gentry is back, and he's not playing around.

The characters were better than ever. The plot was nearly flawless. The Violator situation will have you ripping through this from start to finish.

Remember, this is fiction. It is not intended to be a reference guide or memoir of plausible CIA activity. Most of the low-ratings will likely hinge on certain details being viewed as “impossible.”

In the end, Back Blast leaves room for more installments. It also tied things off in a way that would be an excellent end to this great series.

Loving the Gray Man series. This was the best in the series so far.

The answer to Gentry's sanction order is revealed, finally. It was a great mystery that was played out to great effect over 5 books. The reveal ends up being a little complicated but makes great sense and absolutely changes the course of the series.

This ties the first book in the series for being my favorite. While the first was wall to wall action with a killer new protagonist, this book has more clandestine operations, intrigue, and extensive character manipulation.