OpenStack Operations Guide
Tom Fifield & Lorin Hochstein & Jonathan Proulx & Everett Toews & Diane Fleming & Joe Topjian & Anne Gentle
The Two Towers
J. R. R. Tolkien
The Lord of the Rings (3)
Network Security Essentials: Applications and Standards
William Stallings
Apache Solr High Performance
Surendra Mohan
RT Essentials
Richard Foley