"To stop the world from burning, it's up to Sigma Force to uncover a secret buried at the heart of our planet. The Titan Project--an international research station off the coast of Australia--discovers a thriving zone of life in an otherwise dead sea. The area teems with a strange bioluminescent coral that defies science, yet holds great promise for the future. But the loss of a military submarine in the area triggers a brutal attack and sets in motion...

"The first and only book to ever be written by a member of America's most secret military unit--an explosive and unlikely story of immigration, service, and sacrifice. Inside our military is a team of operators whose work is so secretive that the name of the unit itself is classified. Highly-trained in warfare, self-defense, infiltration, and deep surveillance, "the Unit," as the Department of Defense has asked us to refer to it, has been responsible...

"In this action-packed thriller in ... Tom Clancy's Op-center series, America's elite task force must take down a group of ruthless domestic terrorists determined to paralyze the country through extreme acts of violence"--