Nan Goldin’s seminal second book, “The Other Side,” is a deeply personal declaration of love and gratitude to the drag queens and transgender community she lived among for decades. Spanning from the early 1970s drag scene in Boston to the 1990s in Berlin and Bangkok, the photographs capture both the glamour and the profound struggles of her subjects. Goldin describes the work not as a study of gender dysphoria, but as an expression of “gender euphoria,” celebrating those who successfully stepped out of the traditional binary “ring.”