I have had the chance over the past couple of weeks to review a copy of Brett Lonsdale and Nick Swan's book about the Business Data Catalog. It is a fantastic book covering everything from "What is the BDC" all the way to how to perform "Write back or Build your own BDC Web Parts". I have to say I learnt a lot about the BDC that I did not already know, there are tons of code blocks that you can use in your everyday work as well as lots of ideas about how it can be used for all kinds of business scenarios. So far I am greatly impressed not only with the book but with Brett and Nick's deep understanding of the Business Data Catalog. For more details pop over to the publishers site using the following URL: http://www.manning.com/lonsdale/