This week's resource isn't a book, article or a website.
It is a person!
Dan Kennedy is a speaker, author, consultant, copywriter and marketing expert. He also is famously opinionated, the self-proclaimed "professor of harsh realities", and he's sometimes controversial.
All of this is true, and while some people won't resonate with his approach or style, it is hard to argue with his results.
If you have interest in marketing or sales you will have the most connection or interest in his writing, as the short list of book titles I recommend below will attest. That said, his no-nonsense approach will be of interest to others as well.
Some of Dan's books that I recommend:

Any serious student of business should have least a cursory knowledge of this prolific, smart and successful guy's work.