The third novel in the series “Caucasian detective, 19th century.” The house of Mirza Riza Khan was built in 1892 near the central park of Borjomi and very organically fit into the city landscape against the backdrop of picturesque mountains. It was erected by order of a Persian diplomat as a summer residence and named Firuza. As befits an old mansion, many tragic and mysterious legends are associated with this place. One of them talks about the Azerbaijani architect Yusuf, who designed the house of Mirza Riza Khan. His work impressed many influential people, and they wanted to get the secrets of this structure. However, the master did not want to share with them, so he was killed along with his entire family. But how are the Jesuits and the tragic death of Pushkin connected with all this? Based on this story, the Belgian writer Marie Tegul wrote this fascinating work “White, Red and Black.”