"There's a theory – this applies to detective novels, and then Harry, which is not really a detective novel, but it feels like one sometimes – that you should not have romantic intrigue in a detective book. Dorothy L. Sayers, who is queen of the genre said – and then broke her own rule, but said – that there is no place for romance in a detective story except that it can be useful to camouflage other people's motives. That's true; it is a very useful trick. I've used that on Percy and I've used that to a degree on Tonks in this book, as a red herring. But having said that, I disagree inasmuch as mine are very character-driven books, and it's so important, therefore, that we see these characters fall in love, which is a necessary part of life."
http://www.nashpanache.com/sayers/placetne.pdf
