No, we only got the movie and Lovesong, which is why we need these books if we're ever going to find out what happens later on.

Would certainly have my vote (if I could find the vote button). The series is complete at 18 volumes, though they have recently released a spin off with Mila as the main heroine as a "what if" kind of scenario. I loved the anime, though I wished there were more series to complete it. I have always loved a low fantasy in a medieval world kind of background.

Don't really know much about the series but I did read the promotional cross-over story they did with Overlord and found it really funny/ good so definitely a series worth an up-vote ; )