I can't really think of anything positive to say about this book. The dialogue is wooden and character voices are indistinguishable from the narrative voice, which tends to repeat similarly worded descriptions frequently - e.g., (not quoting, but trying to recreate the kind of thing that proliferates through this book) He never could trust a woman since his heart had been broken all those years ago when the woman he loved laughed at him......He once believed himself in love, but he learned a lesson when the lady laughed at his offer...His memory of being laughed at made him determined never to love again. Blah blah blah. The psychology is so simplistic and the constant and repetitive telling instead of showing made the book nearly a wallbanger. (A downside of using an e-reader is not getting the relief of flinging an exasperatingly bad book).
Everything is spelled out so that even the thickest of readers doesn't have to do any thinking at all. Artificial scenarios abound, like a person talking in complete sentences while in a drunken sleep - enough to create a Big Misunderstanding (one of many). Main characters have the emotional maturity of 12-year-olds, constantly stomping off or retreating into weepy martyred silences, instead of asking pertinent questions and giving honest answers. I realize not everyone is rational all the time, but I would have liked a few glimmers of it, just so that I knew the author could construct a plot and a conflict that wasn't based on sheer stupidity.
Creativity seems limited though - not only are all the characters pretty much stock characters - tempestuous aristocrat, saintly twin, evil twin, gambling neglectful father, grateful servant, kindly aunt (and more - the cliches abound in this book) - but a major fight over a purloined necklace seems directly out of a Georgette Heyer novel (April Lady , I think).
On top of all that, there's the risible moralizing - to a thief and blackmailer, our sainted heroine pronounces: "I hope we shall not meet again - until you have learned to respect others, at least," like a parody of a grade school teacher to a naughty 8-year-old. Play nice, children, and respect others' property.
I was going to give it 2 stars, just because I did finish it, but honestly, it was kind of awful.