Error accessing Chapter 14 of ePub "Professional ASP.NET MVC 3"

I recently purchased the eBook (ePub) version of "Professional ASP.NET MVC 3", and have been reading through it using the Bookworm reader. However, when I navigate to Chapter 14, "Advanced Topics", I receive the following error:

"This book contained content that Bookworm couldn't read. You may need to check with the publisher that this is a valid ePub book that contains either XHTML or DTBook-formatted content."

Is there a problem with this ePub file?
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