The book "High Voltage Transmission Line Ceramic Insulators" by Nouruddeen Bashir provides a comprehensive analysis of the challenges associated with the aging of ceramic insulators in high-voltage overhead lines. It explains how electrical stresses and environmental influences can impair the functionality of these insulators, leading to a continuous flow of leakage current on their surface. These conditions contribute to the aging of the insulators, which are often in operation for decades. The book presents a novel method for assessing the surface condition of aging glass insulators that is more cost-effective, efficient, and time-saving than conventional methods. The investigation of surface leakage current shows a strong correlation between the frequency components of the leakage current and the condition of the insulators, suggesting the possibility of online monitoring of aging insulators. These findings are particularly valuable for the electric utility industry and professionals in the field of power engineering.