I’m currently reading The Filter Bubble by Eli Pariser. I downloaded the book as a DRM free epub (I’m funny about where I buy my books from as I have a Kindle, an iPad & an iPhone so i tend to chop and change my reading device). I’m about 50% of the way through the book and it’s quite scary stuff. It’s so far prompted me to slim down my Facebook account, including removing extra information from the account. I’ve also taken steps to block tracking websites by disabling tracking in Firefox & ramping up my Adblock Pro. It’s really crazy how much money can be made from your information, you think you are benefiting from a great free service but the company behind it are normally profiting hugely from sharing your information.
It really is a great read, give it a look and grab a copy for your kindle or iPad.