New York Times reporter BranchÕs chronicle of Derek BoogaardÕs winning but ultimately tragic life as hockeyÕs greatest enforcer is as tense and exciting as a hockey gameÉ Branch captures the sorrow and anguish of a young athleteÕs career collapsing due to the combination of drugs and chronic traumatic encephalopathy (CTE)øa kind of dementia that causes memory loss and emotional instability (sufferers are referred to as Òpunch drunksÓ)øand asks piercing questions about violence in sports-Publisher’s Weekly