Since 1913, The Blue Book of Building and Construction has been the construction industry's premier information source. The Blue Book, headquartered in Westchester County, New York, publishes regional construction directories in most major markets throughout the United States. Online, thebluebook.com provides easy access to continually updated information for each of The Blue Book's regional editions. Construction buyers and sellers also have free access to BB-Bid, The Blue Book's online bid management system, complete with a private secure online plan room and integrated takeoff and markup tools.