Your book is definitely an excellent contribution (I bought it as soon as I found out about it). When I first came to the language I was a little surprised that

Your book is definitely an excellent contribution (I bought it as soon as I found out about it). When I first came to the language I was a little surprised that O'Reilly didn't have a book out, but I guess it was too unstable even for them. Having a good reference that covers not only the syntax (which isn't that hard to learn, let's be honest) but the best practices and common patterns in the language is always a real help.