The Seduction of the Crimson Rose (Pink Carnation Series #4)

Lauren Willig continues the exciting series with her fourth novel, The Seduction of the Crimson Rose, featuring Lord Vaughn, the delightfully devilish spy from The Masque of the Black Tulip, and Mary Alsworthy, the raven-haired beauty whose sister accidentally stole her suitor in The Deception of the Emerald Ring.