Coelho Paulo. Veronika Decides to Die

It tells the story of 24 year old Veronika, 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). It is based around the subject of madness. The gist of the message is that "collective madness is called sanity". 26 pages only!