Magdalen Nabb: The Monster of Florence (USA 2013)

From the Publisher:
Based on a chilling true crime, The Monster of Florence follows the reopening of a cold case -- a serial killer who targeted unmarried couples and terrorized Florence for two decades.

Marshal Guarnaccia's job with the carabinieri -- the local Florentine police -- usually involves restoring stolen handbags to grateful old ladies and lost cameras to bewildered tourists. So when he is assigned to work with the police in trying to track down a vicious serial killer, he feels out of his league. To make matters worse, the Proc he must report to is Simonetti, the same man he knows drove an innocent man to suicide several years earlier in his blind quest for a conviction. The Marshal can't let the stress of the case get to him if he wants to make sure justice is upheld.

Magdalen Nabb: The Monster of Florence. A Marshal Guarnaccia Investigation. Soho Press, ISBN: 9781616953256 (October, 2013), 345 p., $14.95

Magdalen Nabb: The Monster of Florence (UK 2005)

From the Publisher:
A chilling, gripping and perceptive novel based on the real-life case of a Florentine serial killer, from the highly acclaimed Magdalen Nabb

Marshal Guarnaccia of the Florence carabinieri is first puzzled and then irritated when he is dragged into a last-ditch attempt to nail the Monster, a vicious serial killer who has ritually slaughtered seven courting couples in the most brutal of circumstances. But he is soon sucked into the horror and squalor of a multi-layered case that has confounded the authorities for over ten years. So when a case is made out against the wrong man - a monster in his own right who beats his wife and sexually abuses his daughter - who is going to admit it? Summoning the courage to speak out, the Marshal rapidly realises that no one wants to listen. It is more comfortable for everyone, even the wrongly accused man, if the blood-soaked vineyards keep their secret of what really happened on the Saturday nights of the new moon...

Magdalen Nabb: The Monster of Florence. A Marshal Guarnaccia Mystery. Arrow, ISBN: 0099489899 (September, 2005), 320 p., £6.99

Magdalen Nabb: The Monster of Florence (UK 1997)

From the Publisher:
Investigating a forgery in the art world, Marshal Guarnaccia of the Pitti Palace carabinieri station is dragged into a final attempt to nail the serial killer who has ritually slaughtered seven courting couples over the last ten years and finds himself facing a forgery in his own line of business.

Magdalen Nabb: The Monster of Florence. HarperCollins, ISBN: 0006499511 (April, 1997), 346 p., £5.99 (?)