Finding recent literature on sensor theory is challenging due to its broad scope, which encompasses physical measurement, specific phenomena, and various sensor technologies. The discussion highlights that different measurement types, such as electromagnetic energy or physical distance, require distinct technological approaches, complicating the search for comprehensive resources. High-tech advancements in sensor technology are often proprietary, limiting access to information typically found in academic texts. The conversation also touches on the need for interdisciplinary resources, particularly regarding biological and chemical sensors. Overall, the search for a suitable textbook or introduction remains difficult, with practical handbooks sometimes providing more theoretical insights than traditional academic sources.