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The 6th Extinction

Sigma Force Novels - A Sigma Force Novel

This book can be downloaded and read in Apple Books on your Mac or iOS device.


A remote military research station sends out a frantic distress call, ending with a chilling final command: Kill us all! Personnel from the neighboring base rush in to discover everyone already dead-and not just the scientists, but every living thing for fifty square miles is annihilated: every animal, plant, and insect, even bacteria.

The land is entirely sterile-and the blight is spreading.

To halt the inevitable, Commander Gray Pierce and Sigma must unravel a threat that rises out of the distant past, to a time when Antarctica was green and all life on Earth balanced upon the blade of a knife. Following clues from an ancient map rescued from the lost Library of Alexandria, Sigma will discover the truth about an ancient continent, about a new form of death buried under miles of ice.

From millennia-old secrets out of the frozen past to mysteries buried deep in the darkest jungles of today, Sigma will face its greatest challenge to date: stopping the coming extinction of mankind.

But is it already too late?

From Publishers Weekly

Jul 14, 2014 – When a research site blows up in a remote California desert, releasing a virulent pathogenic entity, the operatives of the secret U.S. agency, Sigma Force, swing into action, in bestseller Rollins's exciting, well-researched 10th Sigma Force novel (after 2013's The Eye of God). Under the command of Grayson Pierce, the Sigma team discovers not one, but two, underground worlds. Scientist Cutter Elwes, who has established his living laboratory inside a mountain in the jungles of Brazil, is targeting through his minion, Maj. Dylan Wright the domain of Professor Alex Harrington, a huge cavern under the ice of Hell's Cape, Antarctica. Elwes's wants to cause a mass extinction, the sixth in the planet's history, to save it from the evils of humankind. The book has everything the genre demands: Nazis, ancient maps, alien life forms, a ticking nuclear clock, and exotic, deadly beasts. Rollins makes it all believable, and ties everything together in a satisfying climax that hints at more adventures to come. 10-city author tour.

Customer Reviews

Awesome read

This is the best yet in the SIGMA series. I couldn't put it down.

Interesting science, a little hokey, would be a good movie.

Not bad, not great. Couple of hammy scenes but all in all, it makes you think. Would make a good movie.

Probably the best Sigma Force novel to date

With nods to the past but introducing plenty of new material, this book is definitely the best of the Sigma series to date.

The 6th Extinction
View in iTunes
  • $9.99
  • Available on iPhone, iPad, iPod touch, and Mac.
  • Category: Mysteries & Thrillers
  • Published: Aug 12, 2014
  • Publisher: William Morrow
  • Print Length: 608 Pages
  • Language: English
  • Series: Sigma Force Novels
  • Requirements: This book can only be viewed on an iOS device with Apple Books on iOS 12 or later, iBooks 1.3.1 or later and iOS 4.3.3 or later, or a Mac with iBooks 1.0 or later and OS X 10.9 or later.

Customer Ratings