In 'Index, A History of the: A Bookish Adventure from Medieval Manuscripts to the Digital Age,' Dennis Duncan takes readers on an enlightening journey through the evolution of the book index, shedding light on its importance as both a literary and intellectual tool. This engaging account traverses time from the monasteries of medieval Europe to the tech hubs of the 21st century. Duncan uncovers tales of indexes saving lives and careers while chronicling the influence they've had on our reading practices. The book challenges the overlooked significance of indexes, showing how this once-unsung feature has shaped the way information is categorized and accessed, ultimately impacting the everyday lives of readers, scholars, and politicians.