Rarely has there been a more confusing time to be a man. This uncertainty has spawned an array of bizarre and harmful underground subcultures, collectively known as the manosphere, as men search for new forms of belonging. In Lost Boys, James Bloodworth delves into these underground worlds and asks where have they come from? Why are so many men susceptible to the sinister beliefs these groups promote? What does the emergence of these communities say about Western society? And what can we do about it? In the course of his journey he meets incels, enlists on a bootcamp for so-called 'alpha males', and speaks to modern day Hugh Hefners using social media to broadcast their jet set lifestyles to millions of followers. Combining compulsive memoir with powerful reporting, fascinating international case studies, data, cultural analysis and history, Lost Boys is an essential guide to the crisis in contemporary masculinity.