[chris_p]

> If you think being famous is what makes someone qualified to create a product you want to buy, then you're not going to buy his product.

That's not what he said. He only asked for some evidence that the writer is really good at "Designing Web Applications", and knows what he's talking about.

[dwolfson20]

How about evaluating the work itself -- through the sample, or buying the book and asking for money back if it's unsatisfactory?