There are a number of high quality books currently published or under development for CouchDB. 

• Beginning CouchDB. December 2009, Apress, by Joe Lennon 
  
  

• CouchDB: The Definitive Guide. January 2010, O'Reilly Media, by J Chris Anderson, Jan Lehnardt & Noah Slater 

   

• Writing and Querying MapReduce Views in CouchDB. January 2011, O'Reilly Media, by Bradley Holt.
• Scaling CouchDB. March 2011, O'Reilly Media, by Bradley Holt.

• Getting Started with GEO, CouchDB, and Node.js. July 2011, O'Reilly media, by Mick Thompson.

• CouchDB: Das Praxisbuch für Entwickler und Administratoren (German). September 2011, Galileo Computing, by Till Klampäckel and Andreas Wenk 
  (please get in touch with andywenk@apache.org) 
  
  

• Getting Started with CouchDB. January 2012, O'Reilly Media, by MC Brown.

• CouchDB mit PHP (german). May 2012 entwickler.press, by Oliver Kurowski 

• CouchDB and PHP Web Development Beginner’s Guide. June 2012, Packt, by Tim Juravich.