Katherine Boo’s about-to-be-released work of non-fiction, Behind the Beautiful Forevers: Life, Death and Hope in a Mumbai Undercity is already getting rave reviews in America and India for the rigour of its reporting and its superb craftsmanship. The book — fast-paced, funny, shocking, evocative and profound — is the outcome of the three-and-a-half years that Boo, a Pulitzer-Prize-winning American journalist, spent following the lives of the residents of Annawadi, a slum near Mumbai’s international airport, in the shadow of big hotels. Senior Editor Anjali Puri interviewed the writer at length on her reporting experiences in Mumbai, on her kind of journalism, which involves being with her subjects—usually people from poor communities — for months and years on end, and on the genre she writes in, sometimes called literary non-fiction. Some excerpts: