The SIGMA Force is a fictional division of the U.S. DARPA program. The chief operatives in SIGMA combine highly trained military skills with specialized scientific knowledge. The Force’s purpose is to investigate and to secure sensitive information that could be a threat to the United States; its functions are a combination of counter-terrorism, research, and covert operations. Following the first book, Sandstorm (2004), the SIGMA Force headquarters moves into the sub-basement of the Smithsonian Institution in Washington, D.C. These novels are intended to be read in chronological order.
“This guy doesn’t write novels-he builds roller coasters…Rollins excels at combining action and history with larger-than-life characters…A must for pure action fans.”
— The Doomsday Key: A Sigma Force Novel
— Booklist
“The science in Bloodline reads like the best of Michael Crichton. The machinations of government read like the best of David Baldacci. And the action and thrills read like the best of Clive Cussler. Rollins takes the best of all of these and creates an amazing thriller unlike any other.”
— Bloodline: A Sigma Force Novel
— Jeff Ayers, Associated Press
“Sigma Force roars back into action…Rollins is a master of the genre, able to sweep us up and carry us along until he brings the story to a riveting conclusion.”
— The Last Odyssey: A Sigma Force Novel
— David Pitt, BOOKLIST (Reader Review)
“His books have everything…Yet it works, because Rollins is a master of controlled chaos.”
— The Devil Colony: A Sigma Force Novel
— Fort Worth Star-Telegram
Sigma Force
Before 2010
Map of Bones (Sigma Force, #2)
Black Order (Sigma Force, #3)
The Judas Strain (Sigma Force, #4)
The Last Oracle (Sigma Force, #5)
The Doomsday Key (Sigma Force, #6)
After 2010
The Devil Colony (Sigma Force, #7)
Bloodline (Sigma Force, #8)
The Eye of God (Sigma Force, #9)
The 6th Extinction (Sigma Force, #10)
The Bone Labyrinth (Sigma Force, #11)
The Seventh Plague (Sigma Force, #12)
The Demon Crown (Sigma Force, #13)
Crucible (Sigma Force, #14)
The Last Odyssey (Sigma Force, #15)
Tucker Wayne
The Kill Switch (Tucker Wayne, #1) 2014
War Hawk (Tucker Wayne, #2) 2016
The Order of the Sanguines
The Blood Gospel (The Order of the Sanguines, #1) 2013
Standalone
Deep Fathom
Excavation
Subterranean