After reading Understanding Enterprise SOA I have started reading a new book:
BizTalk 2006 Recipes: A Problem-Solution Approach
By Mark Beckner, Ben Goeltz, Brandon Gross, Brennan O’Reilly, Stephen Roger,Mark Smith, Alexander West
ISBN: 1-59059-711-7 560 pp. Published: Sep 2006
BizTalk 2006 Recipes: A Problem-Solution Approach is based on the experiences of many of the most prominent experts in the field. It features over 170 problem-solving recipes for BizTalk developers and administrators.
BizTalk Server 2006 builds on the heritage and core architecture of BizTalk Server 2004, leading to a powerful tool that encompasses the latest Microsoft technologies and industry standards for automating and managing business processes. BizTalk Server 2006 adds incremental value to BizTalk 2004 by improving administration, deployment, and other key areas of the product.