Bang by Barry Lyga

Fourteen-year-old Sebastian Cody accidentally shot and killed his four-month-old sister Lola at age four; a decade later he wrestles with guilt, a fractured family, and recurring suicide ideation while befriending Muslim newcomer Aneesa and building a YouTube pizza channel.

This book’s main concerns are; accidental shooting (fatal), alcohol, prolonged grief, explicit suicide ideation/planning, homicidal ideation/planning, minors access to guns, severe psychological distress, and survivor guilt.