These Old Shades (English, Paperback, Georgette Heyer)

It is so entertaining, and so novel, to be a gilded saint in the eyes of unfledged innocence. I shall keep the boy for just so long as he continues to amuse me…

Society believes the worst of Justin Alastair, the notorious Duke of Avon who is clearly proud of his sobriquet, ‘Satanas’. It is he who buys Léon body and soul from a scoundrel in a Paris backstreet. The red-headed urchin has strangely familiar looks, and should play a fine part in Justin’s long-overdue schemes to avenge himself on the Comte de St Vire – until, that is, Léon becomes the ravishing beauty Léonie…