Serpent Bloom: The Fortress Protocol

Deep in the rainforests of Belize, former Navy SEAL Nolan Mercer is sent to investigate the disappearance of a team of humanitarian aid workers near a crumbling colonial fortress swallowed by jungle vines. What begins as a routine search-and-rescue mission spirals into a deadly conspiracy when environmental scientist Paige Hollowell discovers that the fortress conceals a hidden laboratory manufacturing banned chemical weapons under the cover of ancient stone walls.
Standing between them and the truth is Gavin Striker, a ruthless security commander whose private militia has orders to erase anyone who gets too close. With systems engineer Elliot Crane hacking through the compound's digital defenses from the shadows, Nolan must fight his way through venomous rainforest terrain, flooded underground tunnels, and forgotten temple chambers before the world pays the price for what's buried beneath the fortress.