Please recommend a complete guide/book on MVVM for silverlight [closed]

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Although there are many MVVM for silverlight demo app/article online, but all of them are very simple and not cover mvvm with depth and extension for LOB app. I am looking for a complete MVVM book/demo in depth related to such as WCF Ria Services, Command, etc.

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Take a look at Advanced MVVM by Josh Smith.

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Advanced MVVM is a good book about basic MVVM concepts, but it does not address the issues for LOB apps. Keep looking.

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For beginners : Take a look at the following article on MVVM basics