Chapter 1: Book introduction: Young adult drinking styles.- Part 1: Changing trends of young adult alcohol use.- Chapter 2: Have recent declines in adolescent drinking continued into young adulthood?.- Chapter 3: Alcohol, Young Adults and the New Millennium: Changing Meanings in a Changing Social Climate.- Chapter 4: Shifting Tides: Life Transitions, High-risk Drinking, and 'Maturing Out'.- Part 2: Diversity in young adult drinking.- Chapter 5: Gender, drinking, and drunkenness: From discourses of gender difference to youthful femininities and masculinities.- Chapter 6: Young adult drinking in low- and middle-income countries (alcohol use in Africa or Asia).- Chapter 7: 'Understanding experiences/ perceptions of young Muslim women in the Danish youth alcohol culture'.- Part 3: Young adults who drink little or no alcohol.- Chapter 8: Non-drinkers and Non-drinking: A Review, A Critique and Pathways to Policy.- Chapter 9: "It seems like even more of a reason to drink": A Literature Review of Temporary Abstinence Challenges (TAC) and Evidence Concerning Immediate Post Challenge Drinking Plans Among Young Adults'.- Chapter 10: "No time for a hangover": The role of No and Low Alcohol drinks in young people's lives.- Chapter 11: "I always joke that I became a bit of a prude": Exploring the contemporary context and young women's lived experiences of sober dating in the UK from sociological, (auto-)ethnographic, insider research.- Part 4: Young adult drinking spaces: staying inside; going outside; digital spaces.- Chapter 12: Social Media, Alcohol Marketing, and Young Adults' Drinking Cultures.- Chapter 13: Friendship and Alcohol Use Among Young Adults: What Do We Know and Where Could Things Go?.- Chapter 14: Into The Woods: Contextualising atypical intoxication by young adults in music festivals and nightlife tourist resorts.- Chapter 15: Home Drinking and Solitary Home-based Drinking Practices Among Young Adults.- Part 5: Young adult drinking styles since COVID-19: policy and practice.- Chapter 16: What the COVID-19 pandemic taught us about violence associated with alcohol consumption.- Chapter 17: Alcohol & Mental Health in Young Adults.- Chapter 18: Conclusion and reflections on future directions.