Reacting, Responding & Initiating
sethgodin.typepad.com
sethgodin.typepad.com
Permission marketing talks about new media and how in the future we can't bombard users with ads (television). Users are too good at tuning these things out. Instead we have to establish relationships and give them things that they actually want.
Purple Cow talks about making unique products and how these products sell themselves. A purple cow is something taking notice over. But once we see one purple cow, its not nearly as interesting the second or third time. We also can't create a blue cow to have the same effect. Our next innovation must truly be unique and special to get the same "purple cow" effect.
Since then he's had other interesting books, but none that translated to an "ah-hah" moment for me.
Go skim some of his books at the bookstore and see if they interest you. I'd highly recommend the two above. His other books I won't vouch for.