struts 2.1 book?

Struts 2.1 is a major upgrade from the previous 2.0.X versions.

I have not been able to find any books for Struts2.1 or ref guides. There is a thread on Struts mailing list but I think Manning has canceled th开发者_如何学JAVAe publication Struts2.1 book

Does anyone know of Struts books being released that cover Struts2.1 in details?

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It appears that the Struts community does not agree that it is a major upgrade. At least they do not think anyone would like to pay to learn about the upgrade.

The best resource is likely to be a Struts 2.0 book and this upgrade guide.