The book "Graph Theory" offers a comprehensive introduction to the fascinating discipline of graph theory, characterized by a variety of significant and applicable theorems. This discipline has gained importance in recent years, particularly due to its central role in modern applied mathematics, including computer science, combinatorial optimization, and operations research. Graphs are essential tools in the design and analysis of communication networks and are also applied in other applied sciences. The book is aimed at advanced students of mathematics and computer science and provides a systematic treatment of graph theory that is both intuitive and aesthetically pleasing. It includes numerous exercises that help readers master the techniques and develop a deep understanding of the material.