Kosuke Togashi, "Conflicts in the Caucasus" - recommended to learn about the conflicts and Russia in Chechnya, Nagorno-Karabakh and Georgia.
This book is not intended to be useful only for understanding the Caucasus region, but also for understanding the issues of ethnicity and nationhood that are emerging in various regions in the international community today. (From the Introduction)"
This work is truly a reference book that allows students to learn about the complex Caucasus situation and also to develop "an eye for conflict in other regions.
Moreover, all of the conflicts in the Caucasus region are conflicts with close ties to Russia.
This is a recommended reference book that will also give you a new perspective on the Russian-Ukrainian war!