In this captivating series by #1 bestseller Jack Mars, elite Delta Force soldier Luke Stone, 29, joins a secretive government agency and is dispatched on the mission of a lifetime: a whirlwind race across Europe and the Mid-East to save the President’s daughter before she is beheaded by terrorists.

PRIMARY TARGET (Book #1), PRIMARY COMMAND (Book #2), PRIMARY THREAT (Book #3), PRIMARY GLORY (Book #4), PRIMARY VALOR (Book #5), and PRIMARY DUTY (Book #6)