The Secret History of the Pink Carnation — Lauren Willig

Nothing goes right for Eloise. The one day she wears her new suede boots, it rains cats and dogs. When the subway stops short, she's always the one thrown into some stranger's lap. Plus, she's had more than her share of misfortune in the way of love. In fact, after she realizes romantic heroes are a thing of the past, she decides it's time for a fresh start.

Setting off for England, Eloise is determined to finish her dissertation on that dashing pair of spies, the Scarlet Pimpernel and the Purple Gentian. But what she discovers is something the finest historians have missed: the secret history of the Pink Carnation--the most elusive spy of all time. As she works to unmask this obscure spy, Eloise stumbles across answers to all kinds of questions. How did the Pink Carnation save England from Napoleon? What became of the Scarlet Pimpernel and the Purple Gentian? And will Eloise Kelly escape her bad luck and find a living, breathing hero all her own?