Clive Cussler Condor's Fury (The NUMA Files, Book 20) By Graham Brown

In "Havana Syndrome," Kurt Austin and Joe Zavala, on a training mission in the Caribbean, respond to a distress call from a damaged freighter. They discover a dead captain and crew members exhibiting symptoms of Havana Syndrome, indicating possible brainwashing.

As they investigate further, Kurt and Joe uncover a sinister plot involving Cuban mercenaries intending to hijack a nuclear submarine using advanced airships. The disappearance of a trawler and the presence of baffling lights add layers to the mystery, heightening the urgency of their mission.

Facing off against ruthless adversaries, Kurt and Joe must navigate treacherous waters and confront the looming threat of a catastrophic attack. With time running out, they engage in a high-stakes showdown in the skies, risking everything to prevent a devastating outcome.

"Havana Syndrome" is a pulse-pounding thriller that combines action, suspense, and intrigue as Kurt and Joe race against the clock to thwart a dangerous conspiracy and protect national security.