'Compelling ... a portrait of the frontline which will fill you with admiration for those who, like Vinten, daily risk life and limb to keep us safe' Sunday Express 'Extraordinary' Mail on Sunday'I loved this book. Gritty and gripping, moving and shocking, this brilliant police memoir shows that life on the force really is different for girls' Erin Kelly, author of He Said, She Said'I've never read such an authentic and interesting account of what it's like to be a female police officer' Louise Voss, author of The Old You'deeply moving and inspiring' Jane Casey, author of the Maeve Kerrigan series'Alice Vinten is the real deal - all the thrills of a crime novel, only true' MJ McGrath, author of Give Me The Child'heartbreaking, funny and, most of all, honest' Lisa Cutts, author of Mercy KillingWelcome to London. Population: 8.7million. And it's your job to keep them safe. A no-holds-barred account of life on the front line of policing, On the Line follows PC Alice Hearn throughout ten years in the Met, from rookie to constable. As she deals with violent criminals, heart-breaking domestic situations, petty crime, life, death, and everything in between, she builds up a portrait of a living, complex city, and what it means to look after it.