As part of the city’s Pride Month events, the Medford Public Library presents an evening with author Sarah Boyer, who will talk about her work as the oral historian at the Cambridge Historical Commission and her new book, “Coming Out, Becoming Ourselves: Lesbian Stories from the Boston Daughters of Bilitis.” Founded in San Francisco in 1955, the Daughters of Bilitis was the first lesbian civil and political rights organization in the country. It was initially conceived as a social club for San Francisco lesbians with the aim of providing an alternative to the lesbian bars that were subject to raids and harassment by the police and the public. It ultimately grew to have chapters nationwide, the last of which dissolved in the late 1990s. “Coming Out, Becoming Ourselves” includes 21 interviews with members of the Boston-Cambridge chapter, chronicling their struggles and the way they joined together to overcome the prejudices of the time. Register through the library’s online calendar.