Definition of "handbook"

handbook

noun
plural handbooks
1. A topically organized book of reference on a certain field of knowledge, regardless of size.
2. (US, gambling) A place where illicit bets can be placed.
  Quotations
  The extent of the business done in this line is not understood by those who have not looked into it. In New York there are 50 pool rooms and 500 handbooks; in East St. Louis, 20 handbooks; in Chicago, 5 pool rooms and 200 handbooks; […]
  1916, U.S. Congress. Senate. Committee on interstate commerce, Prevention of Transmission of Race-gambling Bets, page 23
  Persons subject to his rule can be found operating, in addition to the wire service, wire service relays, handbooks, gambling houses, prostitution establishments, coin-operated device companies, bars, restaurants, night clubs, motels, […]
  1961, United States. Congress. Senate. Committee on Government Operations. Permanent Subcommittee on Investigations, Gambling and Organized Crime: Hearings