 This section does not intend to provide a historical overview of the Daoist tradition, but only brief notes on its principal schools and lineages. (The only book-length study of the history of Daoism in a Western language is Robinet 1997b, which however only covers the period from the origins to the 14th century. Shorter, reliable historical surveys include Schipper 2000 and Bokenkamp 2005a.)