This is a beautiful book: the Bella Mia of the title is intended, I think, to refer to the town of L'Aquila, wrecked in the earthquake of 2009; but it could also refer to the much-missed Olivia, killed when a building collapsed on her.
Her twin sister begins her narrative three years on. Sharing a small, temporary flat with her elderly mother and the troubled teenage son of Olivia (his father flits in and out of his life) she weaves in the many aspects of life that are different now. Their clandestine forbidden visits back to their destroyed former homes; neighbours coping with tragedy at different rates; memories of Olivia; a slow return to life of feelings and interests.
Because she doesn't come across as sentimental or hugely vulnerable, this works brilliantly. I'd forgotten all about this earthquake and was googling the massive devastation as I read. Very very good read. ( )