Erika de Wet is Professor of International Law in the Faculty of Law of the University of Graz, Austria. She is also Honorary Professor in the Faculty of Law, University of Bonn, Germany. She was the SARChI Professor of International Constitutional Law, University of Pretoria, South Africa. She was also founding Co-Director of the Institute for International and Comparative Law at the Universits of Pretoria. She was also tenured Professor of International Constitutional Law at the Amsterdam Center for International Law.Erika de Wet completed her B. Iur and LL.B as well as her LL.D at the University of the Free State (South Africa). She holds an LL.M from Harvard University and completed her Habilitationsschrift at the University of Zurich.She is currently is a member of the Scientific Advisory Board for Development Policy of the Max Planck Foundation for International Peace and the Rules of Law; and the General Council of the International Society of Public Law (ICON*S).

The book is well written and compelling. Rather than delving into enigmatic theoretical principles often in need of decoding, De Wet tackles controversial issues on a practical level.

• Acknowledgments Abbreviations 1: Introduction 2: The authority entitled to extend an invitation for direct military assistance 3: Direct military assistance on request during civil wars 4: Direct military assistance to incumbent governments implicated in violations of international humanitarian and/or human rights law 5: Formal requirements for valid consent to direct military assistance 6: The relationship between military assistance on request and the right to individual or collective self-defence 7: Conclusion

Erika de Wet is Professor of International Law in the Faculty of Law of the University of Graz, Austria. She is also Honorary Professor in the Faculty of Law, University of Bonn, Germany. She was the SARChI Professor of International Constitutional Law, University of Pretoria, South Africa. She was also founding Co-Director of the Institute for International and Comparative Law at the Universits of Pretoria. She was also tenured Professor of International Constitutional Law at the Amsterdam Center for International Law.Erika de Wet completed her B. Iur and LL.B as well as her LL.D at the University of the Free State (South Africa). She holds an LL.M from Harvard University and completed her Habilitationsschrift at the University of Zurich.She is currently is a member of the Scientific Advisory Board for Development Policy of the Max Planck Foundation for International Peace and the Rules of Law; and the General Council of the International Society of Public Law (ICON*S).

The book is well written and compelling. Rather than delving into enigmatic theoretical principles often in need of decoding, De Wet tackles controversial issues on a practical level.

• Acknowledgments Abbreviations 1: Introduction 2: The authority entitled to extend an invitation for direct military assistance 3: Direct military assistance on request during civil wars 4: Direct military assistance to incumbent governments implicated in violations of international humanitarian and/or human rights law 5: Formal requirements for valid consent to direct military assistance 6: The relationship between military assistance on request and the right to individual or collective self-defence 7: Conclusion