"Digital Electronics: Principles and Applications" by Roger Tokheim is a comprehensive textbook that introduces the fundamentals of digital electronics. It covers essential concepts such as logic gates, Boolean algebra, combinational and sequential circuits, and microcontrollers. The book emphasizes practical applications, providing hands-on projects and exercises to reinforce theoretical knowledge. Tokheim's clear explanations and illustrations help readers delve into the intricacies of digital systems, making it a valuable resource for students and professionals seeking to understand the ultimate principles behind digital technology.