New Clique book?

I was on polyvore.com and one of my contacts told me that she was on this website (that I don't remember the name of) and it said there was a 13th clique book. It was called The Clique #13 My Little Phony and it was due out August 19th,2010. I don't know if it's true because Lisi's never mentioned it on her blah-g.