There's a site that sells book bundles, pay what you want, for nine books (they chose) in the bundle. Pay at least $12 and you get three extra.

Here.

You can get on their list to be notified when they have a new bundle up. 

I think I did one ages ago, Scifi ones IIRC. I remember I paid for the extra three, and IIRC everything was fine. I just don't do bundles very often because its either a lot of them I don't care about, or already have. So I'm only really interested once in a blue moon.

I'd check individual prices elsewhere and make sure none are currently freebies. Otherwise, may be a good deal for someone. I'd recommend them more, but I honestly don't remember all that much other than I get the email once in a while.