She's a high-society fugitive hiding behind spectacles. He's the cold-hearted Duke who never breaks a rule. Until she becomes the one rule he can't help but shatter. After her father's spectacular fall from grace, Lady Elara Vance did the unthinkable: she vanished. Trading her diamonds for charcoal-gray wool and her title for a forged alias, she finds refuge as a governess in the most dangerous place imaginable—the household of the formidable Arthur Penhaligon, the "e;Iron Duke"e; of Sterling Park. Arthur is a man of rigid order and icy restraint, dedicated to scrubbing his family name of his father's scandalous legacy. He has no time for distractions, especially not from the sharp-tongued, overly observant woman teaching his sister. But beneath Elara's dowdy disguises and scholarly debates lies a fire that threatens to melt his carefully constructed armor.