• 55 Memorial Library
• 5 Law Library
• 4 College Library
• 1 Wisconsin Historical Society Library

• 13 Private investigators
• 10 Investigation
• 10 Murder
• 5 Crimes against
• 4 Police
• 3 Booksellers and bookselling
• 3 Ex-convicts
• 3 Organized crime
• 3 Reacher, Jack (Fictitious character)
• 3 Retirees
• 3 Serial murders
• 3 Taylor, Jack (Fictitious character)
• 2 Brenner, Simon (Fictitious character)
• 2 Casinos
• 2 Conspiracies
• 2 Corey, John (Fictitious character)
• 2 Kidnapping
• 2 Mercenary troops
• 2 Missing persons
• 2 Police corruption
• 2 Politics and government
• 2 Prevention
• 2 Revenge
• 2 Secrecy

• 4 Bruen, Ken
• 3 Child, Lee
• 3 Haas, Wolf
• 3 King, Jonathon
• 2 DeMille, Nelson
• 2 Digitalia (Firm)
• 2 Harvey, John, 1938-
• 2 Padura, Leonardo
• 2 Parker, T. Jefferson
• 2 Romero, María Esperanza
• 1 Adams, Jane A
• 1 Adams, Jane, 1960-
• 1 Airth, Rennie, 1935-
• 1 Ani, Friedrich
• 1 Baldacci, David
• 1 Barreto Monzón, Nemecio
• 1 Barry, Sebastian, 1955-
• 1 Benedict, Alexandra, 1977-
• 1 Block, Lawrence
• 1 Campbell, Colin, 1955-
• 1 Connelly, Michael, 1956-
• 1 Cook, Judith, 1933-
• 1 Cunniffe, Dee
• 1 Dee, Ed
• 1 Dunning, John, 1942-2023

• 60 English
• 5 Spanish
• 1 Dutch
• 1 German
• 1 Italian
• 1 Thai

• 6 England
• 5 California
• 5 New York (N.Y.)
• 4 Galway
• 4 Ireland
• 3 Austria
• 3 Everglades (Fla.)
• 3 Florida
• 3 Galway (Ireland)
• 3 Los Angeles (Calif.)
• 3 New York
• 3 New York (State)
• 2 Cuba
• 2 Havana
• 2 Los Angeles
• 2 San Francisco (Calif.)
• 1 Atlantic Ocean
• 1 Australia
• 1 Belgium
• 1 California, Southern
• 1 Chicago
• 1 China
• 1 Cornwall (County)
• 1 Cornwall (England : County)
• 1 Denver (Colo.)

Limit year range