Silver Bullet

Author: Stephen King
Saga: unique book
Spanish: No

This novelette takes us through the twelve full moons of the year.
With each full moon comes a murder and the only one that seems to notice is a disabled boy named Marty whose best friend was murdered by the beast that is hunting the small town.
Due to the canceled four of July fireworks Marty's uncle gave him as a present a box of firecrackers, so that night he decided to try them out, so he snuck out of the house and lit a few of them, Marty didn't know he was being watched.
The beast attacked him but Marty was quick enough to pull out a firecracker and lit it up to defend himself. It worked out perfectly since he hit it in the left eye wounding it severely.
Thanks to this a few months later, on Halloween's night, Marty finds out who the beast is.