Madness is a strange book that is both disturbing, moving, disturbing. It reads easily and tells a story of friendship and love. Heroine Marie asked me problems because it is difficult to identify with her and empathize. She hates so much that it is difficult to love. Mary is deeply linked since childhood to Thomas and Matthew, his two best friends. When Mathieu disappears from his life without explanation, his world collapses. Thomas weaves its strange side relationship with a dangerous man: Ludo. Ludo strangely attracted Mary and whose violence responds to his. If all of the novel I liked without moving me is the final letter that gave the whole dimension to the story.