He was dismissed as a crackpot, his theories on a legendary Amazonian creature ridiculed. Now, a cryptic message and a scorched journal might prove him terrifyingly right.

Outcast scholar Knox Wilder believes in Juma’s Fang, the Lizard Man of the Amazon. Shunned by the academic world, his pleas for funding an expedition are met with scorn. But when a mysterious courier delivers Father Calderon’s burnt journal, fifty thousand dollars in cash, and a mission to find the lost missionary, Knox plunges into the green hell he’s only dreamed of.

Joined by Rhea Mallory, a pragmatic ex-Army medic skeptical of his "imaginary horrors", Knox follows Calderon’s trail deep into uncharted territory. The Yawanawa tribe’s legends of a “Skin-Changer”, tales of the ill-fated Matheson expedition, and whispers of green-glowing stones soon give way to chilling discoveries: a savaged boat, a compass that spins wildly, and an abandoned village marked by an ominous symbol.

Their quest leads them to a forgotten temple mound, where ancient hieroglyphs depict terrifying Serpent-Men, human sacrifice, and a creature that wears the skins of its victims. As they descend into the earth, they unearth the horrifying truth behind the Lizard Man: a guardian of an ancient, parasitic intelligence known as the Kaa’Pari Uassu, an entity that corrupts minds and demands sacrifice.

When the monstrous Lizard Man reveals itself in a bloody confrontation, Knox and Rhea are thrown into a desperate fight for survival against a creature of impossible power and an ancient evil that can warp reality itself. Trapped in collapsing ruins, hunted by a relentless predator, and facing a force that threatens to consume them body and soul, their expedition becomes a terrifying descent into primordial horror.

Will they escape the Amazon with their lives and sanity intact? Or will they become just another whisper in the jungle, another sacrifice to the Green God? Dive into a thrilling adventure where forgotten legends hunt the hunters, and the greatest discovery could be your last.