Wer bin ich - und wenn ja wie viele?

Wer bin ich – und wenn ja, wie viele? is a non-fiction book written by German philosopher and author Richard David Precht and published in 2007. In 2008, it ranked number 1 on the bestseller list by Spiegel for 16 weeks. In April 2011, the English translation Who Am I? And If So, How Many? was released. The subject of Precht's investigation, which is aimed at general understanding, is the discussion of fundamental philosophical questions about human consciousness and behavior, taking into account more recent psychological and neurobiological findings. The declared aim of the book is to awaken and train the desire to think and to encourage progressive self-knowledge and a more consciously led life.