The Fallen Angel

Standard entry in the Gabriel Allon series, which goes like this: some kind of crisis happens, usually in the Vatican. Gabriel is drawn in, against his will. He assembles his team. During the effort to defeat the first crisis, a much bigger one ensues. Ari Shamron appears. Eli Lavon appears. Chiara is extremely beautiful but otherwise serves no purpose. Gabriel defeats plot #2. As an afterthought, plot #1 is taken care of.