The Mammoth's Roar. The Epoch Shifter, #2

Forty thousand years ago, the Earth is a graveyard of ice. And the ghosts are finally hungry. Jaxen Rift survived the Cretaceous, but the 25th century is no longer enough for him. Back in the sterile, grey domes of Mega-Sector 4, the "Shift Withdrawal" is a slow poison. His heart beats for the wild, for the rain, and for the parents he lost to the rifts a decade ago. When a new anomaly appears in the Pleistocene, Jax doesn't hesitate.
He steps back into the Chrysalis and leaps into the teeth of a super-blizzard. This time, the Shift is different. To survive the sub-zero wasteland, Jax must undergo Titan Mode-a massive rewrite of his DNA that grants him the strength of a behemoth and the hide of a winter god. But the Pleistocene is not empty. Amidst the migrating mammoth herds, Jax encounters the children of the stone: a tribe of Neanderthals led by the fierce and soulful hunter, Korg.
For the Temporal Watch, these people are "evolutionary waste"-data points to be observed but never touched. But as Jax stands shoulder-to-shoulder with Korg against a new horror, he realizes the history books were wrong. The antagonist is the White Death, a Void-Sabertooth infected by the Chronophage. It doesn't just hunt for meat; it hunts for time, mimicking the voices of the people Jax loves most to lure him into the dark.
As the "Super-Storm" threatens to erase the era, Jax reaches the 100% Feral Limit. His humanity is slipping away, replaced by the permanent roar of the beast. To save the tribe and protect the future, Jax must make the ultimate sacrifice: violate the sacred laws of time travel and use future technology to save a "savage" friend. In a world where the very air wants to freeze your soul, Jaxen Rift must decide if he is a cadet of the future or a brother of the past.
The hunt is on, the mammoths are roaring, and the timeline is bleeding.