After years of sleepless nights, British writer and editor Marina Benjamin penned Insomnia, a lyrical, witty and humane account of a malady that’s a source of deep angst for its sufferers and often afforded scant analysis by others. She sits down with Angela Ledgerwood to expand on a memoir that weaves together musings on everything from Nabokov’s dream diaries to Greek mythology, with reflections on the rituals and remedies she’s turned to in her ongoing quest for rest.