Rachel Kelly’s Bio: Former Times journalist, internationally bestselling author and Mental Health advocate Rachel Kelly’s latest book, The Happiness Diet: Good Mood Food (release date 09/17) shares her holistic approach to staying calm and well after a long battle with anxiety. Her previous books Black Rainbow: How Words Healed Me–My Journey Through Depression (Sunday Times bestseller) and Walking On Sunshine: 52 Small Steps to Happiness (international bestseller) chronicle her personal journey with depression and recovery.