17 Blade by Jesse Storm

At 17, Slade “The Blade” Cassidy lives only for revenge. His family was slaughtered, and his sister Millie, assaulted and left for dead, survives but went mute from the trauma. With Dakota Hawthorne – his childhood friend also at 17 years old and a deadly shot – Blade hunts the twelve men behind the attack, ending with his ruthless uncle Austin.