Red Axe of Pellucidar (Edgar Rice Burroughs Universe)

The groundbreaking Edgar Rice Burroughs Universe series continues with the thrilling sequel to Mahars of Pellucidar by John Eric Holmes in its first authorized edition!
Chris West's deadly prowess with his weapon of choice had earned him the name Red Axe in the Stone Age world of Pellucidar at the Earth's core. Sentenced to die along with the woman he loved by the merciless Mahars, West had fought his way free of the lethal laboratories and ghastly arenas of their underground city. Now he must carve a path for his small band of fugitives through a primordial landscape teeming with monstrous beasts and brutish men bent on their destruction.
Includes the bonus novella "Jason Gridley of Earth: Across the Moons of Mars-A Tale of the Swords of Eternity Super-Arc" by Geary Gravel!
Hurled from world to world by the vagaries of subatomic entanglement, Jason Gridley is plucked from the surface of Barsoom for a whirlwind tour of its mysterious satellites. Menaced by carnivorous cat-men on one moon and marooned with the survivors of a thousand-year-old catastrophe on the other, Jason and an enigmatic fellow traveler from Earth must find some way to survive the perils that threaten to spell their doom.