SON OF THE SHADOWS
When Isabelle de Bouvard, Guardian of the House of Flames, loses her memory bringing back Jean-Marc Devereaux, Guardian of the House of Shadows, from the brink of death, Jean-Marc knows he must battle her evil sister Lilliane to win back the missing part of his soul. The two, along with their followers, set off for New York and then Haiti to battle Lilliane, Guardian of the House of Blood. Son of the Shadows (4), by Nancy Holder, is a good continuation of the Guardian series. Holder's paranormal world is both exciting and convincing.