Deborah Levy draws her epigraph for The Cost of Living from Marguerite Duras’s Practicalities: ‘You’re always more unreal to yourself than other people are.’ Practicalities (1987) is a series of interviews Duras gave to a young friend with all the questions left out and the interview format effaced. Levy’s book is, similarly, one side of an intense conversation about life, love, power, home-making and writing.