"Great book by a great author; weak narrator"
No offense to the narrator, but I've listened to many audiobooks and many better narrators are out there.
The narrator lacks a range of vocal control that would make this far better. His accents are terrible, and the voices he fakes really are weak. They sound amateurish and some are too similar to others to make them feel comfortably like a distinct character.
I'm a fan of the Gabriel Allon series, and will keep on going.