Helen Russell, author of the global bestseller “Hygge, or Cozy Happiness the Danish Way,” spent several years in Denmark and revealed the secrets of the happiest country in the world. Few know that the famous writer was deeply unhappy in her past. In “It’s Normal to Be Sad,” she combines her personal story with astonishing research and warm advice. This book will hold you in a difficult moment and help you understand that there are no “extra” emotions.