Rob Thurman is best known for the Cal and Niko Urban Fantasy series starting with Nightlife. Most of Thurman's covers have been Chris McGrath paintings, but it looks like Roc wanted to go for more of a Sci-Fi feel for Chimera so they turned to artist Aleta Rafton.
I still wanted to do a book that explored a relationship between brothers, although a significantly different take on it as these brothers have been separated for ten years. And the older brother is not necessarily the wise, 'good' brother. And although there's action, guns, genetic engineered monsters, sarcasm (of course), the book is about establishing that brotherly bond when one brother refuses to admit it exists and has no memory of his former family at all. If you read Dean Koontz, the older Lightning and Watchers was the feel of what I wanted for this book with a Sixth Sense smackdown ending. Hands down, this is my favorite book that I've written. What Cal and Niko always had, Stefan and Michael have to struggle for...and the struggle...writing it was like giving birth...only a lot less messy and no guy telling you he feels your pain (I've never given birth, but I'd like to think I'd punch a man in the testicles on that one.)Chimera will be released in June of 2010 between Cal Book Five and the second Trixa Novel.