Early Adopter Curl
   A book designed for programmers new to the Curl Content Language. Overview. Chapter 3 online text.
   http://wdvl.internet.com/Authoring/Languages/Curl/Early/

Enterprise Curl
   An advanced level handbook giving advice on how to develop a full-featured enterprise application written in Curl.
   http://www.webreference.com/internet/enterprise/curl/