The book “An Introduction to Number Theory with Cryptography” by James S. Kraft and Lawrence C. Washington is a comprehensive textbook that covers the subjects of Mathematics, particularly Number Theory, and its applications in Cryptography. Published in 2013 by CRC Press LLC, this hardcover book spans 572 pages and is written in English. It is designed for students and professionals interested in Communication Studies, General Mathematics, and the practical application of Number Theory in cryptography. With a detailed exploration of Number Theory concepts and their relevance to cryptography, this book serves as a valuable resource for those looking to delve into this fascinating field.