When everyone is quarantined on a once-peaceful island off the coast of Maine, Tucker questions a secret branch of the military claiming that residents have been infected by a deadly virus.

In this compilation of four previously published books, Lieutenant Commander Ryan Cross and his team of military specialists go into action in the Middle East, Africa, and Antarctica.

Danny Manion lands in the Studies and Observation Group, a volunteer task force that focuses on covert action and psychological warfare during the Vietnam War.

Gabriel Greene is too young to join the military, but after Pearl Harbor he and his sickly older brother, Dallas, each take the other's name. The Army has special uses for soldiers as ferocious and tenacious as Gabe-- the First Special Service Force. From the start it's intended to go where other soldiers won't-- and soon Gabe and his fellow commandos will get their wish: combat. -- adapted from jacket The First Special Service Force is an elite...

When a video surfaces of a man making terrorist demands, an ex-teammate of the Shadow Squadron recognizes the man as a former SEAL, lost in an operation nine years before--but something is strange about the video, and it is up to Lieutenant Commander Ryan Cross and his team to locate and capture the apparent traitor in Afghanistan.