I'm not sure on the link of "Scooby-Doo Comic Chapter Books". It looks like it might need a colon after "Scooby-Doo". But on the covers, there's an exclamation mark. I was wondering if that was okay with you if I added that?
The titles of the books come directly from the publisher's official website (http://abdopublishing.com/shop/show/8069), and since they are also used on Amazon, I think it's safe to assume that they are the official titles.