Recommendation request - Valet (mmc or fmc)

I searched the sub but didn't find much. Could you recommend anything with either the fmc or mmc being a valet?

I've read all of S.M. Laviolette, as well as {Listen to the Moon by Rose Lerner}. I also vaguely remember something in which the mmc has the fmc disguised as his valet (what was that!?!?). I could not find flesh and the devil on kindle, so ANY recommendations available on kindle welcome!