In “Letters of a Radio-Engineer to His Son,” John Mills artfully weaves a captivating narrative that encapsulates the technical intricacies of radio engineering, while simultaneously addressing broader themes of curiosity, creativity, and the father-son relationship. Written in the epistolary style, this collection of letters illuminates not only the scientific principles underlying radio technology but also reflects on the profound life lessons embedded within each technical explanation. Set against the backdrop of early 20th-century technological advancement, Mills' prose is characterized by clarity and accessibility, making complex concepts relatable and engaging for both budding engineers and general readers alike. John Mills, a notable figure in the field of radio engineering during the early decades of the 20th century, drew from his extensive professional experience to craft these letters. His intimate knowledge of the industry and personal dedication to mentorship shine through, offering insight into his relationship with his son as well as his hopes for future generations of engineers. Mills' background in academia and industry provides a rich foundation upon which he builds his correspondence, making the technical realizations both insightful and approachable. This book is highly recommended for anyone interested in the convergence of technology, education, and personal relationships. Both engineers and parents will find inspiration in Mills' journey as he demystifies the world of radio engineering while imparting invaluable lessons about life and passion. A timeless classic, it serves as a reminder of the enduring connection between knowledge and familial bonds.