A Fine Line is the fifth and most recent (2014) in the Guido Guerrieri series by Gianrico Carofiglio – at least until the new one comes out next month, after a long hiatus. Per SYKM, A Fine Line was a finalist for the 2017 International Dagger Award. It has dropped to $1.99/£1.99 at Kindle US/UK right now.
