The definitive account of sport's concussion crisis, how its 'dirty secret' was finally made public and what rugby union must now do to save itself.

By recounting the untold story of the most influential sports campaign in British newspaper history, which turned concussion in professional rugby from a niche issue into front and back page news, Concussed poses the questions all sports lovers need answering as evidence grows linking sports-related concussions to premature deaths and dementia.