Why are adult friendships so hard to make and maintain? And what can we do about it? Those are the questions Anna Goldfarb tries to answer in this quick, easy-read book. It was validating to know that I’m not alone in the struggles I face in trying to hold onto friendships in this attention-scattered modern world. I especially liked Goldfarb’s exercises scattered throughout the book, and the 14-day “friendship cleanse” appendix that walks you day-by-day through two weeks of reigniting your friendships. I also liked the discussion of friendship “tiers”: bathtub friends (your 1-2 most intimate friends), jacuzzi friends (2-5 very close friends, your support network), swimming pool friends (10-15 shoulder-to-cry-on friends, the people you stay in regular contact with and have shared personal details with), bonfire friends (~50 people in your contact list from school, jobs, extended friends circle, etc.), and water park friends (~150 people who would attend your once-in-a-lifetime event like a wedding or funeral). The categories are fluid (pun intended), but Goldfarb suggests focusing on our bathtub, jacuzzi, and swimming pool friends – we all have limited time and energy, so focus on quality in-person time with fewer friends, rather than superficial online pings and “likes” with more. All told, I liked this book and will probably be doing a “friendship audit” of my own at some point in the near future.