League of Denial: The NFL, Concussions and the Battle for Truth by Mark Fainaru-Wada and Steve Fainaru

Excellently written, impactful stories, solid science and a scandal as big as Big Tobacco... I couldn't put it down and read the whole thing in a weekend.

Absorbing and disturbing. I used to glorify Iron Mike back in the day. Hearing his story and that of his family trying to take care of him as his cognitive function deteriorated was heart-wrenching. All the while as the NFL suppressed data and fought him tooth and nail from paying disability.

Key takeaway: Letting your kids play football is akin to child abuse.