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I've read your book Database Backed Web Sites and enjoyed it very much. It was the most entertaining technical book I've ever read. Come to think if it, it's the only technical book that I've ever read from cover to cover.
One of my favorite parts was the case study of your Remind Me system. It was simple enough to follow, yet "real world" enough provide useful examples -- not just another tutorial that has you write six pages of code in order to print "Hello world" on the screen.