Martin Fowler

one of the Agile Software Development gurus http://www.martinfowler.com/

book author

• Patterns of Enterprise Application Architecture ISBN:0321127420 see catalog of Patterns, plus post-pub work
  • see also Enterprise Integration Patterns ISBN:0321200683 mainly written by others to focus on Messaging approach
• ReFactoring ISBN:0201485672 http://www.refactoring.com/