Blah, this one doesn't really count, I started it, then skimmed it, and didn't actually read the whole thing.
Shop, Save, Share by Ellie Kay
It was kinda out of date. Published in 1998. It is basically a book about using coupons, but it is written pretty much pre-cyberspace and doesn't include the many resources that are available online. It was kinda cute/funny in parts in a hokey sort of way, but there was no new information for me. I should have known better anyway, I've read enough of these types of books already.
I'm not counting this one, that would be cheating. I have to actually read the whole book.