Silent Threat (Executioner Series #380) by Don Pendleton
When several German CEOs become victims in deadly accidents and their strategic companies are suddenly bought out, red flags are raised in U.S. intelligence circles. All signs indicate that the buyouts are being orchestrated by the head of a powerful cult and he's planning a terrorist attack. But getting to the cult leader and ending the threat proves to be challenging—especially when an army of zealous followers bristling with weapons are prepared to die for the cause.
Mack Bolan is determined to infiltrate the group and destroy the organization before they unleash their plan of destruction. The cult leader may believe he can bring death, but there is only one Executioner.