What's your essential reading list for making money online?

OK, so we all know BHW is great and possibly the only resource one needs!

But which book's have you found essential in your pursuit for on line earnings?

Sorry, I image this question has been asked many times before. I just couldn't find the current thread!

Lord ZOD I humbly offer your this:

Not a book, but a podcast. Active Growth podcast.
The "forget traffic" series totally changed my perception on putting customers first.