IBM has several Redbooks that provide in-depth details for WebSphere MQ. Here are 5 MQ related Redbooks that I have found:
WebSphere MQ V7.0 Features and Enhancements
WebSphere MQ V6 Fundamentals
WebSphere MQ V6, WebSphere Message Broker V6 and SSL
WebSphere Application Server V6.1: JMS Problem Determination
WebSphere MQ Solutions in a Microsoft .NET Environment
Regards,
Roger Lacroix
Capitalware Inc.