DMXZone is the first site to have put up a sample chapter for Beginning ASP.NET Databases. The one they have is Chapter 6: an introduction to DataSets and DataReaders. Other sites will get Chapter 9 on Stored Procedures. DMXZone is also running a competition to win a free copy of the book. Good luck if you decide to have a go and enter it. I'll also be writing some Dreamweaver-based articles based on the book for DMX Zone in the coming weeks so look out those there as well.
If you'd rather pick up a copy of the book online, here are the places to buy it that I've found so far.