Digital Money: The New Era of Internet Commerce

One of several books on how to make a buck on the Internet, focussed in particular on the new technology of digital commerce, what it enables. I think this book is probably better than most, although I haven't sampled the field. The exposition is correct (at least in what I can verify), and gets into enough detail that you can understand what the issues are without becoming overwhelming.
If you've read Schneier then the technical chapter will be too simplistic, but the chapters on economics, social influences, and business plans are great. Chapter 5, "New Business Concepts", was the most valuable for me: exploring what options new technologies make possible. I thought the technotopic vision in the final chapter was a bit facile, but that's just futurist writing. Mostly the book gives a responsible treatment of the implications of moving commerce online. Extra points for addressing concerns about privacy and social equality.