In the new edition of the book "An Introduction to Number Theory," on one hand, many exercises have been added along with their solutions, and on the other hand, many topics have been explained in more detail, providing more examples and applications.

The writing of the book represents a more extensive and detailed development of the material of the Number Theory course, which the author - professor, Dimitris Deriziotis, has taught for many years in the Mathematics Department of the University of Athens.