Revolver, paperback/marcus sedgwick

Set in 1910, a cabin north of the Arctic Circle where 15 year old Sig Amdersson is alone, except for the corpse of his father, who died after falling through the ice.

When a man claiming to have unfinished business with his father arrives, Sigs thoughts are drawn to a hidden box containing his fathers revolver.

Sigs choice is pulled into focus.

Should he use the gun, or not?.