Veronica Decides to Die

It tells the story of Veronika, a 24-year-old Slovenian who appears to have everything in life going for her, but who decides to kill herself. This book is partly based on Coelho's experience in various mental institutions (see the biography Confessions of a Pilgrim by Juan Arias), and deals with the subject of madness. The gist of the message is that "collective madness is called sanity"