This is an excellent book about network programming. In fact, it is so good that I could even envisage creating a networking course around it! The only things preventing it from getting a straight ten, is the shallow coverage of Twisted (of course, it would probably make the book twice the size) and the pretty one-sided Linux/Unix coverage (it would have been nice to see some Windows and MacOS specifics added, as it is Python).

Anyway, you wont regret reading this book.