First of all, Arthur and Merlin? Spot on. Second of all... More? *puppy dog eyes* I don't even know Francis and Michael (Traitor Games is still on my to-read list; I haven't managed to find a copy yet) and I love them.

To start a category, you have to put in a request, which my or may not ever be answered. Until then, there's always the Miscellaneous Books category, though.