The sixth title in this crime series set in Venice and featuring Commissario Guido Brunetti. In this latest story, Brunetti tries to protect a nun who has left her nursing convent after the mysterious deaths of five patients. Has Maria Testa stumbled on a sinister web of corruption and murder? Other titles include "The Anonymous Venetian, A Venetian Reckoning" and "Acqua Alta". Now published by Random House, her latest title, "A Noble Radiance" is out in Heinemann hardcover this month.