The book tells about the life and work of the outstanding enlightener of the 17th century, the forerunner of the idea of ​ ​ Slavic unity, a prominent figure in the socio-political thought of Russia in the second half of the 17th century. Yuri Krizhanich. The book describes the dramatic and complete unexpected turns of Krizhanich's life - from the first news of his parents to the description of the trip to Moscow, the link to Tobolsk and the last years of his life; it is told about the circumstances of the creation of the works of Krizhanich; impressions of staying in Russia were conveyed; an assessment of the views of Krizhanich and his main works is given. Such a biographical sketch is created for the first time not only in Soviet, but also in foreign" science and literature.