Home › Mitch Rapp › Oath of Loyalty O Oath of Loyalty by Vince Flynn · Book 22 of Mitch Rapp Buy on Amazon About “Oath of Loyalty” Oath of Loyalty is a 2022 book by Vince Flynn. It is book 22 of the series Mitch Rapp. ← Enemy at the Gates All Mitch Rapp books in order Code Red →