[from Kent who found this on Tim O'Reilly's blog]

As you can see, the gains of C#, mentioned above, are even more striking than on the primary category treemap. While Java is off 10%, C# is up 78%. And that's without counting books whose programming language shows up as ".Net Languages." These are books that cover both C# and VB.Net. Combining these two categories, the C# book market is now actually a bit larger than the Java book market.

 

ASP.Net is also on a roll, with book sales up 61% and JavaScript is up 171% because of AJAX.

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