The Duke of Avon is strolling home one night and happens upon a ragamuffin fleeing from their nasty guardian. The Duke buys Leon and makes him his page and soon figures out that Leon is actually Leonie and that a mystery surrounds her.
As usual, I enjoyed the side characters more so than the main. Rupert had me cracking up every time he spoke and I just loved Fanny's silliness. Of course, I just loved Leonie, as well. She was a very outspoken heroine, not at all the norm.
When a Heyer novel makes me grin like a silly person without realizing it, then it is definitely a keeper! These Old Shades is a true Heyer classic! On to Devil's Cub!