Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Oversimplified and in some cases wrong

I'm not in the habit of trashing someones work, as it's not the easiest thing in the world to write a book, regardless of the content.Anyhow, this book is far too superficial to really be called 'Building a Content Management System', as it really only scratches the surface. Granted, it does build a system that manages content, but the design is largely skipped in favour of some code.The real reason I wanted to write this review though is that the book is plain wrong in one area - the author suggests that there is no way to provide your own custom role implementation, which isn't true - just take a look at the GenericPrincipal class in MSDN.