'Signals is a special book, a witty, utterly fascinating guide to who you are and how you work. Saira Hameed reveals the endocrine system, and places it at the center of self knowledge; a system of control, but also a set of signals we can learn to interpret. You won't find hormone "hacks", or glib shortcuts, but by the end I understood my own appetite, fatigue, stress, and all the other experiences my hormones control, so much better. It's compassionate, humane and grounded in the author's deep clinical experience. A true gift.' 
Chris van Tulleken ― author of ULTRA-PROCESSED PEOPLE

'A fascinating tour of endocrinology, surely the most outlandish but also humane of the medical specialties. Hameed isn't just an exceptional doctor, she is a natural storyteller. Unputdownable!' Gabriel Weston ― author of ALIVE

'Signals is fascinating and totally absorbing. Dr Saira Hameed is both an insightful guide to the mysteries of our hormones and a gifted storyteller.'
Jenny Kleeman ― author of SEX ROBOTS AND VEGAN MEAT

'This is the book I have been waiting for since I was a teenager. Hameed's timely, brilliant and engaging journey through the hormones that control our brains and bodies is infused not just with deep curiosity but wisdom, and compassion. Signals will make you question everything you thought you knew about the choices we make and emotions we feel: men, and women, and at every stage of our lives.'
Aarathi Prasad ― author of IN THE BONESETTER'S WAITING ROOM

'Through patient case studies and the thrilling stories of the scientists behind the discoveries, Saira Hameed takes us on a journey through the hidden chemical conductors of our health. Hameed is the kind of doctor you'd love to be referred to: knowledgeable, compassionate and with knack for translating science into stories that inspire and entertain.'
Caroline Williams ― author of INNER SENSE

Hameed is as eloquent as she is knowledgeable . . . A must-read in any era, but especially this one. ― Kirkus Reviews