L'occhio di vetro

The Cardinal is not just a magnificent specimen of beetle. For Napoleone Di Carlo, former policeman in Addis Ababa, now hotelier in Switzerland and entomologist by passion, he is above all a ruthless and elusive criminal. It is one of the Cardinal's assassins who gets himself killed at the Geneva station, just as the fugitive killed in Napoleon's hotel is a former accomplice of his. At the crime scene, a strange object appears, a glass eye similar to those used by animal taxidermists. Where will this very thin trace lead?