I'm not really surprised The Black Moth is so low. I do quite like it but it does feel to me very obviously a First Novel and doesn't withstand the same degree of re-reading as her others.

I'd have put the Masqueraders higher up the list too. It is my top choice for 'Heyer novel that ought to be made into a film.' I just think that if they could pull off the opening sequence so that the audience is properly fooled it would be awesome.