Yes, I'd have to agree with most of the comments here - the idea is good, but they can get a bit twee at times and repetitive. The TV series was actually better because the plots suited TV drama and Derek Jacobi is a great actor!
There is a site:
http://themedievalbookclub.blogspot.com/ which lists quite a few writers in this genre and might give you a starting point to search your local library an sample a few.