This heart-stopping historical mystery from plot-master Avi will reach the wide audience it deserves with its fresh and compelling new cover treatment!The night Edmund's twin sister, Sis, goes missing, the streets of nineteenth-century Providence, Rhode Island, are filled with menacing shadows. As Edmund frantically searches the city, he tries to make sense of what happened: He only left Sis alone long enough to buy bread. How did she vanish in the mere minutes he was gone?Just as Edmund is about to lose hope of finding her, a stranger appears out of the mist and offers to help. But the man is gloomy and full of secrets. He seems to need Edmund to carry out plans of his own. Can Edmund trust him? And if he doesn't take the chance, how will he ever find his sister?