Title Changes and Fourth Book Cover

First off, I've decided to change the titles of books three and four to Feros and the Underworld Prince, and Feros's Haunting Melody respectively.
Second, here is the prototype cover for the fourth book:


For those of you still waiting for news on the release of the third book, I still don't have a definitive answer yet, but it will most likely be released during August at the latest.