The Hunt for a Mastermind.

The Hunt for a Mastermind

A naturalised Englishman, Fahjeed Rashwan secretly is a fanatical disciple of al-Qaeda. He travels to Afghanistan to propose a cunning plan to Osama Bin Laden’s successor. The preparations to carry out his plan take him to Beirut and Amman, where he recruits two important pawns for his sinister game.

Cas van Daelen is an analyst for the Dutch counterterrorism agency NCTV. Just when he is ordered to investigate a suspected rise in Islamification within the Netherlands, he meets Rejhana, a lovely Dutch convert to Islam. Cas gets acquainted with former Police Chief Inspector Hans Buurman following a lecture on fundamentalism in the Netherlands. When three inexplicable accidents occur across the globe at the same time, Hans suspects al-Qaeda’s involvement. Although Cas is not convinced, he joins Hans in an investigation of this theory.

Following a shocking action by an Israeli pilot, the whole world is in an uproar. Israel is feeling the pinch, the CIA is on top of developments and the Netherlands is inexorably drawn into a spiraling whirlwind of violence.

An unknown faction called Muhammad’s Warriors has proclaimed a second attack in the Netherlands. Security services are scrambling to find out the target of the terrorists.

Is it the royal family? Perhaps the Canal Festival in Amsterdam or the Western Scheldt Tunnel? Former CI Hans Buurman of the Amsterdam police, Cas Van Daelen of the NCTV and Mossad analyst Albert Kooistra are the determined think-tank in charge of preventing this attack. However, al-Qaeda’s mastermind Fahjeed Rashwan is also playing the Devil’s game…

Samir K.G

A gripping thriller that feels all too real.

Reviewed in the United States on November 11, 2025

Format: Kindle Verified Purchase

The Hunt for a Mastermind by Rolf Osterberg is a chilling and intelligent page-turner that dives deep into the

dark world of global terrorism and espionage. The plot moves seamlessly between continents, weaving political

intrigue, psychological tension, and high-stakes action into a story that feels frighteningly plausible. The

characters — especially Cas, Hans, and the cunning Fahjeed Rashwan — are layered and believable, each

driven by conviction and conflict. This isn’t just another spy novel; it’s a deeply researched, fast-paced thriller

that keeps you questioning motives and morality until the final page.

Emma Harrell

A Smart and Tense International Thriller

Reviewed in the United States on January 16, 2026

Format: Kindle Verified Purchase

The Hunt for a Mastermind is a gripping geopolitical thriller that blends realism with suspense. Rolf Österberg

crafts a believable cat-and-mouse game between counterterrorism analysts and a chillingly intelligent extremist

mastermind. The story moves smoothly across international locations while maintaining a tight focus on the

Netherlands as the looming target. Cas van Daelen and Hans Buurman feel authentic, grounded, and

professionally flawed, which adds credibility to the investigation. The unanswered questions surrounding the

impending attack create constant tension. Rather than relying on nonstop action, the novel excels through

psychological depth and strategic intrigue, making itboth engaging and thought-provoking.

Alison Bower

Realistic, Thoughtful, and Unsettling.

Reviewed in the United States on January 9, 2026

Format: Kindle Verified Purchase

This novel stands out for its realistic portrayal of modern terrorism and intelligence work. The Hunt for a

Mastermind avoids clichés by focusing on analysis, uncertainty, and the dangerous consequences of being

wrong—or too late. Fahjeed Rashwan is a particularly unsettling antagonist, portrayed as methodical rather than

theatrical. The collaboration between Dutch intelligence, Mossad, and global agencies feels authentic and

well-researched. The suspense builds steadily as possible targets are teased but never confirmed, keeping

readers constantly guessing. Rolf Österberg delivers a serious, intelligent thriller that feels disturbingly

plausible in today's geopolitical climate.

KALU

A Slow-Burn Thriller with High Stakes

Reviewed in the United States on December 29, 2025

Format: Kindle Verified Purchase

Rolf Österberg’s The Hunt for a Mastermind is a compelling slow-burn thriller that rewards patient readers. The

story builds tension through investigation, dialogue, and global political pressure rather than explosive action.

Cas van Daelen’s skepticism and Hans Buurman’s experience create a strong investigative dynamic, while the

shadowy threat of Mohammed’s Warriors adds urgency and dread. The novel’s strength lies in its realism,

showing how fragmented intelligence and ideological extremism can spiral into chaos. The constant uncertainty

over the attack’s location keeps the stakes high until the end, making this a tense and absorbing read.

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