East European Triad: Early Modern Ukraine between the Crimean Khanate and the Polish Crown (The review on monographs by Chukhlib T.V. Cossacks and Tatars. Ukrainian-Crimean alliances of 1500s–1700s. — Kyiv, 2017. — 278 pp.; Chukhlib T.V. Magnate, Cossack and Haidamaka. Struggle for Power in Rus’-Ukraine with the Polish Crown (1569–1768). — Kyiv, 2018. — 258 pp.; Series «International history of Ukraine»; Publishing House «Kyiv-Mohyla Academy»)