Is there a good book on modern microprocessor design? Specifically, something that assumes I know the basics of microprocessors but want to know the advanced details.

Hennessy and Patterson's Computer Architecture remains the bible.

Modern Processor Design: Fundamentals of Superscalar Processors by Shen & Lipasti

Computer System Design: System-on-Chip by Flynn & Luk

Want to tell us about a good book on the basics in the mean time?

How much money are we talking about? :)

Ten bucks

At his rate, that probably buys you a couple seconds of his time. If he can teach you his introduction within that, I think he should be charging more ;)

Buy H&P

Is that a book you are referring to?