The Sword of Cyrus: A thriller

by JC Ryan

Overview

A weapon smaller than a phone. A threat larger than civilization.

Deep in the Zagros Mountains of Iran, a secretive group calling themselves The Sword of Cyrus has engineered the ultimate weapon—a nanotech nuclear device small enough to fit in a mobile phone yet capable of unleashing the force of seven Hiroshima bombs. Its purpose? To wipe Western civilization off the map.

For Dalir Jahandar, vengeance is more than a mission—it is his destiny. A descendant of kings, he is determined to restore the ancient Persian empire to its former glory. Just as Cyrus the Great conquered Babylon by outwitting his enemies, Dalir and his secretive network of powerful allies will infiltrate their enemies from within, striking when they least expect it.

Daniel and Sarah Rossler, along with their team at the Rossler Foundation, find themselves at the forefront of the battle. Known for their work in archaeology and cutting—edge science, the Foundation is drawn into a global conspiracy where history, technology and warfare collide. With Dalir’s operatives closing in and time running out, they must navigate a treacherous landscape of espionage and betrayal to stop the unthinkable from happening.

Will the Rossler Foundation prevail, or will the world succumb to the devastating power of the Sword of Cyrus?

The Sword of Cyrus is the fourth gripping installment in JC Ryan’s acclaimed Rossler Foundation Mystery series, where ancient ambitions meet modern warfare in a high—stakes battle for the future of civilization.

________________________________________________________  

Praise for the Rossler Foundation Mystery series:

★ ★ ★ ★ ★ There is not a page wasted in The Sword of Cyrus—every moment as tight and gripping as the next one.

★ ★ ★ ★ ★ JC Ryan is a literary alchemist.

★ ★ ★ ★ ★ From cover to cover I was unable to put the book down.

★ ★ ★ ★ ★ Definitely a five—star novel.

★ ★ ★ ★ ★ Captivating and suspenseful!

★ ★ ★ ★ ★ ...these novels literally leave you clutching the edge of your seat.

Product Details

ISBN-13:	9781036700416
Publisher:	Vinci Books Ltd
Publication date:	11/11/2025
Series:	A Rossler Foundation Mystery , #4
Pages:	478
Product dimensions:	5.10(w) x 7.80(h) x 1.15(d)

About the Author

JC Ryan is a bestselling author known for crafting intricate espionage and archaeological thrillers and conspiracy mysteries. His work has received high acclaim. With over thirty published novels, including the popular Rex Dalton thrillers, the Rossler Foundation mysteries, and Carter Devereux thrillers, Ryan has developed a devoted following who celebrate his masterful blend of historical mystery and contemporary adventure. Readers praise Ryan's work for its exceptional research depth and how he skillfully weaves actual history into fictional narratives. His engaging plots, featuring multiple storylines, have earned him a reputation for creating 'unputdownable' stories.

Ryan's diverse life experiences deeply inform his writing. After receiving a military degree, he served as an officer for seven years until a crippling back injury forced a career change. Undeterred, he returned to university to study law and ran his private practice for over fifteen years. His career path then led him to another country where he worked as an IT project manager, before finally pursuing his lifelong dream of becoming a writer in 2014. When not writing, Ryan enjoys life with his college sweetheart, whom he's been married to since 1978. They are proud parents of two daughters and two sons—in—law and grandparents to two grandchildren.