The Revenant, by Michael PunkeRead about another entry on the list.
In the early 19th century, a man named Hugh Glass is attacked by a grizzly bear while on a trapping mission with a handful of other men. Badly mauled and far away from even the primitive medical care available at the time, he’s left for dead with two men instructed to guard him from local (and antagonistic) American Indian tribes and bury him properly when he dies. When American Indians do arrive on the scene, however, the men steal Glass’s weapons and other gear and abandon him—but not only does he not die, he drags himself hundreds of miles to an outpost, heals, and then sets out to seek revenge. This story seems as impossible as 127 Hours, but it’s just as real; Punke’s exhaustive research proves it happened.
The Revenant is on Melissa Albert's list of top adaptations.