This academic book, 'Fundamentals in Set Theory', by author A. Azzam Sabri, provides a comprehensive introduction to the foundational principles of set theory. Published in 2017, it serves as an essential resource for university students specializing in mathematics and related fields. The text systematically explores key concepts such as sets, subsets, operations on sets, relations, functions, and cardinality. It aims to build a solid logical framework, enabling students to understand more advanced mathematical topics. The clear explanations and structured approach make it an ideal textbook for both introductory courses and self-study, bridging the gap between basic concepts and complex abstract reasoning.