Books like Deep Fathom by James Rollins

Craig of the Mohicans, a frontier scout turns away from civilization, forming a bond with a Mohican warrior as they escort two sisters across the perilous wilderness of America's frontier.

James Rollins launches a high‑stakes thriller as elite covert operatives chase the stolen bones of the Three Magi across Germany, the Vatican, and the Seven Wonders, unearthing an ancient alchemical conspiracy that threatens humanity.

A global thriller where a series of mysterious murders linked by a Druidic symbol forces Commander Gray Pierce and Sigma Force to decode an ancient riddle and confront a deadly prophecy tied to a hidden Doomsday Key.

A submarine crew tasked with rescuing two Iranian nuclear technicians from a dangerous assignment, but must contend with their own submarine's malfunction.

In James Rollins’ ‘Sandstorm’, a London museum blast triggers a global hunt for the hidden city of Ubar in the Arabian desert, as two women and a former Navy SEAL race against ruthless agencies to uncover an ancient power that could reshape humanity.

As taken from the author website (www.jamesrollins.com): The Rand scientific expedition entered the lush wilderness of the Amazon and never returned. Years later, one of its members has stumbled out of the world's most inhospitable rainforest: a former Special Forces soldier - scarred, mutilated, terrified, and mere hours from death - who went in with one arm missing...and came out with both intact. Unable to comprehend this inexplicable event, the government sends Nathan Rand into this impenetrable secret world of undreamed - of perils to follow the trail of his vanished father...toward mysteries that must be solved at any cost. But the nightmare that is awaiting Nate and his team of scientists and seasoned U.S. Army Rangers dwarfs any danger they anticipated...an ancient, unspoken terror - a power beyond human imagining-that can forever alter the world beyond the dark, lethal confines of the Amazon rainforest for better... and for worse.

Galilee, 1025. Infiltrating an ancient citadel, a Templar knight uncovers a holy treasure long hidden within the fortress's labyrinth: the Bachal Isu -- the staff of Jesus Christ -- a priceless icon that holds a mysterious and terrifying power that promises to change humankind forever. A millennium later, Somali pirates hijack a yacht off the coast of the Horn of Africa, kidnapping a young pregnant American woman. Commander Gray Pierce is enlisted for a covert rescue mission into the African jungle. The woman is no rich tourist: she's Amanda Gant-Bennett, daughter of the U.S. president. Suspicious that the kidnapping masks a far more nefarious plot, Gray must confront a shadowy cabal which has been manipulating events throughout history...and now challenges the current presidency. For this unique mission, SIGMA is aided by a pair of special operatives with unique talents: former Army Ranger Captain Tucker Wayne and his military war dog, Kane. But what should be a straightforward rescue turns into a fiery ambush and a deadly act of betrayal, as Gray and his team discover that the hostage is a pawn in a shattering act of terrorism with dark repercussions. And the danger is only beginning... Halfway around the world, a firebombing at a fertility clinic in South Carolina exposes a conspiracy that goes back centuries...a scheme that lies within our genetic code. With time against them, SIGMA must race to save an innocent unborn baby whose very existence raises questions about the nature of humanity, asking: Could you live forever? Would you live forever?

Nine years after the Falklands War, a 2011 geopolitical clash erupts over a secret oil strike, with Britain, Russia, and the United States pulling in elite forces for a high‑stakes battle of naval and covert warfare.

An English tourist impersonates a new king in a fictitious European Kingdom of Ruritania, leading to political intrigue and a thrilling adventure set in 1894.