A fascinating but not altogether an easy read. Costanza tells the story, based on real people, of Costanza Piccolomini and her love affair with Lorenzo Bernini. Lorenzo is part of Rome’s elite society favoured by the Pope so when it all goes wrong Costanza bares the brunt. 
There is a slow start to this book and Costanza is not a particularly nice character but then again no one else is either. 
My biggest disappointment is that it simply ended too soon. It finished up just as Costanza was coming into her own and showing us what an intriguing character she really was. 
Would definitely recommend this book, well worth a read. 

Thanks to NetGalley.co.uk and the publishers for this ARC.