Frank Buschmann & Kevlin Henney 
Pattern-Oriented Software Architecture, Volume 4, A Pattern Language for Distributed Computing [PDF ebook] 

The eagerly awaited Pattern-Oriented Software Architecture
(POSA) Volume 4 is about a pattern language for distributed
computing.
The authors will guide you through the best practices and
introduce you to key areas of building distributed software
systems. POSA 4 connects many stand-alone patterns, pattern
collections and pattern languages from the existing body of
literature found in the POSA series. Such patterns relate to and
are useful for distributed computing to a single language.
* The panel of experts provides you with a consistent and
coherent holistic view on the craft of building distributed
systems.
* Includes a foreword by Martin Fowler
* A must read for practitioners who want practical advice to
develop a comprehensive language integrating patterns from key
literature.