Sergey Sayapin is Assistant Professor in International and Criminal Law at the School of Law of the KIMEP University in Almaty, Kazakhstan.Evhen Tsybulenko is Professor of Law at the Department of Law of the Tallinn University of Technology in Tallinn, Estonia.

• Part I. Jus Ad Bellum.- Chapter 1. The Legal Nature of States’ Obligations Towards Ukraine in the Context of Jus Contra Bellum.- Chapter 2. Who are the "Crimea People” or “People of Crimea”? The fate of the Crimean Tatars, Russia's legal justification for annexation, and Pandora's Box.- Chapter 3. Illegal Territorial Regimes: On the Operation of International Law in Crimea.- Chapter 4. Conferral of Nationality of the Kin State – Mission Creep?.- Chapter 5. International Legal Aspects of Russia’s War against Ukraine in Eastern Ukraine.- Chapter 6. Separatists or Russian Troops and Local Collaborators? Russian Aggression in Ukraine: The Problem of Definitions.- Chapter 7. The Legal Status of the Donetsk and Luhansk “Peoples’ Republics”.- Part II. Jus In Bello.- Chapter 8. Legal Challenges Associated with Hybrid Warfare.- Chapter 9. The Operation of Treaties and International Contracts in the Event of Armed Conflict: Problems Reopened by Russian Aggression against Ukraine.- Chapter 10. Cyber Attacks in the Ukrainian Conflict and the Role of International Law.- Chapter 11. Foreign Fighters in Russia’s War against Ukraine.- Chapter 12. Children and the Armed Conflict in Еastern Ukraine: International and National Legal Aspects.- Chapter 13. The International Legal Dimensions of Russia’s Occupation of Crimea.- Chapter 14. The Russian-Ukrainian War in Donbas: Historical Memory as an Instrument of Information Warfare.- Chapter 15. An Alleged “Genocide of Russian-speaking Persons” in Eastern Ukraine: Some Observations on the “Hybrid” Application of International Criminal Law by the Investigative Committee of the Russian Federation.- Part III. Jus Post Bellum.- Chapter 16. The Promise and Pitfalls of Regional Reconciliation: Post-conflict Modalities in Critical Comparative Perspective.- Chapter 17. Triggering the ICC's Jurisdiction over Alleged Crimes Committed Across Ukraine, Including in Crimea and the Donbas.- Chapter 18. War Crimes Committed during the Armed Conflict in Ukraine: What Should the ICC Focus On?.- Chapter 19. Sexual Violence in War-torn Ukraine: A Challenge for International Criminal Justice.- Chapter 20. The Post-conflict Reconstruction of Trust in the Media.- Appendix.

Sergey Sayapin is Assistant Professor in International and Criminal Law at the School of Law of the KIMEP University in Almaty, Kazakhstan.Evhen Tsybulenko is Professor of Law at the Department of Law of the Tallinn University of Technology in Tallinn, Estonia.

• Part I. Jus Ad Bellum.- Chapter 1. The Legal Nature of States’ Obligations Towards Ukraine in the Context of Jus Contra Bellum.- Chapter 2. Who are the "Crimea People” or “People of Crimea”? The fate of the Crimean Tatars, Russia's legal justification for annexation, and Pandora's Box.- Chapter 3. Illegal Territorial Regimes: On the Operation of International Law in Crimea.- Chapter 4. Conferral of Nationality of the Kin State – Mission Creep?.- Chapter 5. International Legal Aspects of Russia’s War against Ukraine in Eastern Ukraine.- Chapter 6. Separatists or Russian Troops and Local Collaborators? Russian Aggression in Ukraine: The Problem of Definitions.- Chapter 7. The Legal Status of the Donetsk and Luhansk “Peoples’ Republics”.- Part II. Jus In Bello.- Chapter 8. Legal Challenges Associated with Hybrid Warfare.- Chapter 9. The Operation of Treaties and International Contracts in the Event of Armed Conflict: Problems Reopened by Russian Aggression against Ukraine.- Chapter 10. Cyber Attacks in the Ukrainian Conflict and the Role of International Law.- Chapter 11. Foreign Fighters in Russia’s War against Ukraine.- Chapter 12. Children and the Armed Conflict in Еastern Ukraine: International and National Legal Aspects.- Chapter 13. The International Legal Dimensions of Russia’s Occupation of Crimea.- Chapter 14. The Russian-Ukrainian War in Donbas: Historical Memory as an Instrument of Information Warfare.- Chapter 15. An Alleged “Genocide of Russian-speaking Persons” in Eastern Ukraine: Some Observations on the “Hybrid” Application of International Criminal Law by the Investigative Committee of the Russian Federation.- Part III. Jus Post Bellum.- Chapter 16. The Promise and Pitfalls of Regional Reconciliation: Post-conflict Modalities in Critical Comparative Perspective.- Chapter 17. Triggering the ICC's Jurisdiction over Alleged Crimes Committed Across Ukraine, Including in Crimea and the Donbas.- Chapter 18. War Crimes Committed during the Armed Conflict in Ukraine: What Should the ICC Focus On?.- Chapter 19. Sexual Violence in War-torn Ukraine: A Challenge for International Criminal Justice.- Chapter 20. The Post-conflict Reconstruction of Trust in the Media.- Appendix.