I have been trying for a while to obtain Sara's autograph and today was lucky enough to, I obtained it through a private address of someone who works with her, I was delighted to obtain this as Pretty Little Liars and the Lying Games are my favourite book series, you can view the autographs on my website below, they are both on my Pretty Little Liars, and the Lying Game pages.
http://abiautographs.weebly.com/pretty-little-liars.html