The Altar of Pergamon by Jonathan Cahn

Ariel Herzog has made a reputation challenging supernatural claims. A cryptic page sends the skeptic and Lara Winter into a globe-spanning investigation of an ancient object, with clues waiting in cities across Europe, the Middle East, and the Americas.

Their search attracts an organization determined to keep the mystery buried. For readers drawn to secret societies and religious intrigue, Cahn's story makes the discovery of each new clue another reason to watch who is following behind.

Twilight Tactics by Lynette Eason

Broken Chains Ranch should be a safe place for FBI agent Sully Sullivan to protect the teenager who witnessed a mob killing. Instead, armed attacks turn the veterans' recovery ranch into a siege, cutting its residents off from help.

Survival instructor Elena Thompson knows how to handle the wilderness, but her own past raises another question about the attackers' target. Expect a tightly contained survival story, a vulnerable witness, and two capable people trying to keep danger from reaching everyone in their care.

Three Steps Behind by Dani Pettrey

Forensic botanist Harper Grace returns to Jeopardy Falls hoping to recover from a difficult FBI assignment. The unexpected death of a friend in her thirties interrupts that retreat, and Harper cannot accept the explanation without asking more questions.

Private investigator Deckard MacLeod joins her search for answers. The case pulls them toward a dangerous truth, giving readers a suspicious death, a close partnership, and an investigation where returning home offers little protection from what comes next.

Shattered by David Jeremiah and Sam O'Neal

John Haggerty is still living with the loss of his family two years after a worldwide disappearance. His work brings him inside the influential Trident Group, where troubling patterns suggest a far larger effort to control governments and economies.

Other observers see warning signs in technology and the earth itself. This second Vanished novel expands the series into a fictional end-times crisis, with several viewpoints revealing pieces of a catastrophe that no single character can fully see.

The Next War by Amir Tsarfati and Steve Yohn

A mass disappearance has disrupted nations and left Israel facing a growing military threat. Intelligence officer Nir Tavor and his team must confront the danger while living with losses of their own.

Tsarfati and Yohn place their thriller in a fictional prophetic scenario, combining intelligence operations with the threat of a regional war. This selection is for readers who prefer their suspense on an international scale, with military action and an apocalyptic setting.

Nothing but Air by Susan May Warren and Tari Faris

A dangerous treasure hunt brings a national park to a halt, leaving its rangers to find the prize before more people get hurt. For dispatcher Eden Garrison, the search means returning to the climbing world she worked to leave behind.

Ranger Teague Hamilton joins her as accidents begin to look increasingly suspicious. The Grand Canyon gives the story its exposed ledges and physical risks, while Eden's guarded past adds a more personal obstacle to trusting the person beside her.

Witness Protection by Robert Whitlow

Jon Tremaine has built a quiet life in Georgia after testifying against a drug cartel. Helping an employee accused of smuggling threatens the secrecy that makes that life possible.

Attorney Kelli Quinn takes the case while rebuilding her own career and family life. As the investigation develops, the legal problem begins reaching into Jon's hidden past. Whitlow's story suits readers who enjoy the tension of a case that can put a client's safety, identity, and future at risk.

Ambush by Colleen Coble

Wildlife veterinarian Paradise Alden returns to her Alabama hometown hoping a job at an animal refuge will help her start again. A body on the grounds makes that hope difficult, and suspicion falls close to Blake Lawson, the man tied to a painful part of her past.

The Sanctuary series begins with a murder investigation, dangerous animals, and memories Paradise has never fully recovered. It offers a way into the continuing story before the threats deepen in Prowl and Conspiracy.

Prowl by Colleen Coble

A death inside the Sanctuary's tiger enclosure looks like an animal attack until the evidence points to murder. Blake Lawson must clear his name while trying to keep the refuge afloat, and a discovery beneath its land creates another possible motive.

Paradise Alden's search for a newly discovered brother brings missing information and a break-in of her own. The second Sanctuary story brings threats into both their lives, leaving the refuge's future and their plans together increasingly uncertain.

Conspiracy by Colleen Coble

The murder of Paradise Alden's parents has shaped her life for fifteen years. Now the unresolved case returns with a new threat, and Paradise, Blake, and her brother Drew begin tracing connections between their families.

A stalking leopard makes the danger immediate, while the investigation exposes secrets someone still intends to protect. The third Sanctuary novel brings the series' long-running mystery closer to its answer, with Paradise's newly found family directly in the killer's path.

Fatal Finale by Nancy Mehl

Erin Delaney expects a visit from her friend Kaely before a trip to watch the filming of Erin's novel. When Kaely disappears, a kidnapper gives Erin six days to follow his clues and save her.

The demand to keep law enforcement out creates an immediate problem for Erin and Kaely's FBI-agent husband. This series conclusion puts the emphasis on the countdown, the puzzle, and the choices facing people whose usual way of finding help could make the situation worse.

Vanished by David Jeremiah and Sam O'Neal

Before the events of Shattered, John Haggerty leads a military unit working to prevent pandemics. A growing pattern of disasters makes that work more urgent even as his relationships with his former wife and daughter unravel.

The first novel in the Vanished series follows a man facing public emergencies and private regret at the same time. Readers interested in the series' fictional end-times setting can begin here before moving into the wider crisis of the second book.

Track of Courage by Susan May Warren

Keely Williams wants to leave Alaska after an unsuccessful search for her biological mother. A hijacking strands her in a far more dangerous situation, with a blizzard closing in and a killer pursuing her.

Former police officer Dawson Mulligan and his adopted dog Caspian become part of the rescue. The story combines a wilderness pursuit with injured people finding a reason to trust again, giving K9-suspense readers a dog with an important part in the action.