'The fortieth anniversary of the Sydney Gay and Lesbian Mardi Gras might have been an occasion for unbridled elation. Held in March of 2018, the celebration came soon after the bitterly fought battle to legalise same-sex marriage in Australia. Dennis Altman, a pre-eminent figure in Gay Liberation, paints a different picture of the Mardi Gras. His new book, Unrequited Love: Diary of an accidental activist, conveys a sense of unease despite the frolicsome charms of such festivities.' (Introduction)