This textbook provides a comprehensive introduction to the fundamentals of Polar, LDPC and Turbo Codes. These codes have become essential cornerstones of advanced communication systems, including, for example, the 5G standard. By simplifying the often-intimidating mathematics behind these codes, this textbook offers clear step-by-step explanations reinforced by simulations that validate and bring the theory to life. Accompanying this textbook are desktop video lectures that explain the theoretical concepts and provide step-by-step walkthroughs of the simulation codes. These videos create a guided learning experience with the author as your personal instructor. Written for undergraduate students, this book equips learners with the tools and understanding needed to explore and apply some of the most powerful error-control codes in modern technology. Whether for academic coursework or self-study, it is your gateway to mastering the critical algorithms driving today?s digital communication.