The Demon Crown: A Sigma Force Novel
Released On: Dec 05, 2017

Off the coast of Brazil, a team of scientists discovers a horror like no other, an island where all life has been eradicated, consumed, and possessed by a species beyond imagination. Before they can report their discovery, a mysterious agency attacks the group, killing them all, save one, an entomologist, an expert on venomous creatures, Professor Ken Matsui from Cornell University.

Strangest of all, this inexplicable threat traces back to a terrifying secret buried a century ago beneath the National Mall: a cache of bones preserved in amber. The artifact was hidden away by a cabal of scientists—led by Alexander Graham Bell—to protect humankind. But they dared not destroy it, for the object also holds an astonishing promise for the future: the very secret of life after death.

Yet, nothing stays buried forever. An ancient horror—dormant in the marrow of those preserved bones—is free once more, nursed, and developed into a weapon of incalculable strength and malignancy, ready to wreak havoc on an unsuspecting world.

To stop its spread, Commander Grayson Pierce of Sigma Force must survive a direct attack on the island of Maui. To be there first has always been the core mission of Sigma Force, a covert team forged to be America’s front line against emerging threats. But this time, even Sigma may not be able to decipher this deadly mystery, one that traces back to the founding of the Smithsonian Institution.

With each new discovery, the menace they hunt is changing, growing, spreading—adapting and surviving every attempt to stop it from reconquering a world it once ruled. And each transformation makes it stronger . . . and smarter.

Running out of time and options, Commander Grayson Pierce will be forced to make an impossible choice. To eradicate this extinction-level threat and expose those involved, he will have to join forces with Sigma’s greatest enemy—the newly resurrected Guild—even it if means sacrificing one of his own.

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Critical Acclaim

  • “…terrific…[and] bone-chilling.”

    Publishers Weekly *starred review*
  • “Rollins’ latest Sigma Force novel is one of the best in the series…the mix of science, history, and high-concept adventure is always first-rate.”



  • Q. You are also active in your support of American veterans. Could you tell us a little bit about your efforts?
    A. Sure. My support for veterans first came about after I participated in a USO tour of authors to Iraq ... Read More
  • Q. How do you go about researching your books and how much time is spent on it?
    A. I certainly do love to dig deep into the subject matters I write about. I love it so much I’ve lea ... Read More
  • Q. A recurring theme in your novels seem to be the advancement of technology and how it affects us. What are your personal views on this advancement? 
    A. As a veterinarian myself, I’ve always loved science, medicine, and technology, especially anything ... Read More
  • Q. You also fold fascinating bits of history into your stories. In this case, you deal with the mysteries surrounding the founding of the Smithsonian Institution in D.C. What made you choose to include this bit of history?
    A. Mostly because so little is truly known about the man who founded the Smithsonian. James Smithson wa ... Read More
  • Q. Speaking of those scientific “what if’s?”: You love to include intriguing concepts in your books. What can readers expect to discover in your newest novel?
    A. This novel serves as a cautionary reminder that we are not living in the Age of Man, but rather—as ... Read More
  • Q. After writing so many stories with Sigma Force, do you have trouble coming up with fresh ideas?
    A. I actually have the opposite problem. I have so many thoughts and ideas for future books that I wish ... Read More
  • Q. Being the 13th novel in this exciting Sigma Force series, does a new reader have to have the earlier stories?
    A. Not at all. I tailor each story so a new reader could jump into the series at any point. In fact, on ... Read More
  • Q. What threat in THE DEMON CROWN could keep Homeland Security up at night?
    A. Specifically the threat posed by invasive species, those foreign invaders to our shores. We’ve al ... Read More
  • Q. What threat does Sigma Force face in this newest thriller, THE DEMON CROWN?
    A. To quote my editor: This book is Sigma’s most frightening adventure to date. And I don’t disagre ... Read More
  • Q. THE DEMON CROWN is the 13th Sigma Force novel. Can you tell us a little about the heroes of your stories?
    A. Sigma Force is a team of former special forces soldiers who have been drummed out of the service for ... Read More


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