Apache Cassandra Documentation (DOWNLOAD .PDF 141 pages) by Roberto Zicari · Published February 16, 2012 · Updated February 16, 2014 Apache Cassandra Documentation. DOWNLOAD (PDF)
CouchDB Tutorial January 1, 2009 by Roberto Zicari · Published January 1, 2009 · Last modified February 16, 2014
Databeans January 1, 2009 by Roberto Zicari · Published January 1, 2009 · Last modified February 16, 2014
Memcachedb: The Complete Guide January 1, 2008 by Roberto Zicari · Published January 1, 2008 · Last modified February 16, 2014