About the book: 2007 / The murder of an elderly French traveler is only the first of a chain of mysterious crimes taking place in a quiet inn in Rome. The famous diplomat and Louis XIV's intelligence officer Abbot Melanie and his "Doctor Watson" (or, more precisely, "Abbé Adson") - the inn's cook. The pursuit of the mysterious killer leads them further and further - either into the dark underground world of the Roman catacombs, then into alchemical laboratories, then into the labyrinths of the Vatican, where an attempt on the life of Pope Innocent XI is being prepared...However, the mystery still remains a mystery, and the criminal is still one step ahead of the hunters!