Kelley Blue Book is a trusted resource for vehicle valuation and automotive research. Founded in 1926, it provides information on new and used car prices, helping consumers make informed decisions when buying or selling vehicles. The book offers various tools, including price calculators and reviews, to assist users in understanding market trends. The name "Blue Book" comes from the original book's blue cover, which listed car prices. Today, Kelley Blue Book operates primarily online, offering a comprehensive database of vehicle values, expert reviews, and automotive news, making it a go-to source for car buyers and sellers alike.