The new book of Prof. Mesut Hakkı CAŞIN, the Head of the International Relations Department, "Modern Uluslararası Hukukun Temel Esasları" is published. This book is a significant source for comprehending the turmoil and the increase in the number of conflicts in the post-Cold War era from a legal perspective. Thus, it would be a valuable contribution to the students and researchers of the field.