Lewis, Margaret,
--Ngaio Marsh's Roderick Alleyn, 1991.
Timlin, Mark,
--William Hjortsberg's Narry Angel, 1991.
Elkins, Aaron,
--Michael Innes' Sir John Appleby, 1991.
Wynn, Douglas,
--Ross McDonald's Lew Archer, 1991.
Mill, Ion,
--Arthur Lyons' Jacob Asch, 1991.
Adey, Robert,
--Joseph Commings' Senator Brooks U. Banner, 1991.
Kerr, Philip,
--Friedrich Dürrenmatt's Inspector Barlach, 1991.
Doherty, P. C.,
--Umberto Eco's Brother William Baskerville, 1991.
Herbertson, Scott,
--Sjowall and Wahloo's Martin Beck, 1991.
Harbottle, Philip,
--John Russell Fearn's "Black Maria," 1991.
Harbottle, Philip,
--John Russell Fearn's "Black Maria," 1991.
Nichols, Victoria, and Susan Thompson,
--Gladys Mitchell's Dame Beatrice Adela Lestrange Bradley, 1991.
Gaiman, Neil,
--G. K. Chesterton's Father Drown, 1991.
Dundee, Wayne D.,
--Andrew Vacchss' Burke, 1991.
Sinclair, Iain,
--William S. Borroughs, 1991.
Gores, Joe,
--Michael Gilbert's Mr. Calder and Mr. Behrens, 1991.
Moorcock, Michael,
--Margery Allingham's Albert Campion, 1991.
Phillips, Mike,
--Ed McBain's Steve Carella, 1991.
Main, Jonathan,
--Nicolas Freeling's Castang, 1991.
James, Russell,
--Peter Cheyney's Lemmy Caution, 1991.
Lejeune, Anthony,
--Earl Derr Biggers' Charlie Chan, 1991.
Van Folly, Soeur,
--Simon Smith's The Clewseys, 1991.
Lupoff, Richard A.,
--Dashiell Hammett's The Continental Op, 1991.
Wright, Eric,
--Howard Engel's Benny Cooperman, 1991.
Buck, Paul,
--Jonathan Latimer's Bill Crane, 1991.
Schorr, Mark,
--Thomas Harris' Jack Crawford, 1991.
Fantoni, Barry,
--Raymond Chandler's John Dalmas, 1991.
Malcolm, John,
--Reginald Hill's Dalziel and Pascoe, 1991.
Peck, Ralph H.,
--Brian Garfield's Charlie Dark, 1991.
Dunlap, Susan,
--Joyce Porter's Chief Inspector Wilfred Dover, 1991.
Eaton, Michael,
--Edgar Allan Poe's C. Auguste Dupin, 1991.
Gilbert, Michael,
--Dorothy L. Sayers' Montague Egg, 1991.
Moyes, Patricia,
--Elizabeth Peters' Amelia Peabody Emerson, 1991.
Jakubowski, Maxim,
--Marc Behm's The Eye, 1991.
Langford, David,
--John Dickson Carr's Dr. Fell, 1991.
Moody, Susan,
--Edmund Crispin's Gervase Fen, 1991.
Williams, David,
--Haughton Murphy's Reuben Frost, 1991.
Butler, Gwendoline,
--Elizabeth Daly's Henry Gamadge, 1991.
Melville, James,
--H. R. F. Keating's Inspector Ghote, 1991.
McGown, Jill,
--Jopesphine Tey's Alan Grant, 1991.
Valentine, Deborah,
--P. D. James' Cordelia Grey, 1991.
Scowcraft, Philip L.,
--A. E. W. Mason's Inspector Hanaud, 1991.
Conquest, John,
--P. B. Yuill's Hazell, 1991.
Keating, H. R. F.,
--Sir Arhtur Conan Doyle's Sherlock Homes, 1991.
Cupp, Scott A.,
--Fredric Brown's Ed and Am Hunter, 1991.
Maron, Margaret,
--Dorothy Dunnett's Johnson Johnson, 1991.
Van Ash, Cay,
--Sax Rohmer's Moris Klaw, 1991.
Schutz, Benjamin M.,
--William McIlvanney's Laidlaw, 1991.
Huang, Jim,
--Sarah Caudwell's Julia Larwood, 1991.
Adams, Harold,
--Seymour Shubin's Lieutenant LaSala, 1991.
Biderman, Bob,
--Tony Hillerman's Joe Leaphorn and Jim Chee, 1991.
Lewin, Michael Z.,
--Liza Cody's Anna Lee, 1991.
Hill, Reginald,
--Anthony Trollope's Mackintosh, Bunfit and Gager, 1991.
Robinson, Peter,
--Georges Simenon's Inspector Maigret, 1991.
Estleman, Loren D.,
--Raymond Chandler's Philip Marlowe, 1991.
Grossman, Wendy M.,
--Agatha Christie's Miss Marple, 1991.
Dale, Celia,
--Magdalen Nabb's "The Marshal,&quo; 1991.
Pronzini, Bill,
--Marcia Muller's Sharon McCone, 1991.
McCrumb, Sharyn,
--Carter Dickson's Sir Henry Merrivale, 1991. (alias of John Dickson Carr)
Wootton, Adrian,
--James Curmleys Milo Milodragovitch, 1991.
Brett, Simon,
--Sue Grafton's Kinsey Millhone, 1991.
Williams, John,
--Ed Lacy's Toussaint Marcus Moore, 1991.
Spurrier, Ralph,
--Colin Dexter's Inspector Morse, 1991.
Ripley, Mike,
--Charles Willeford's Hoke Moseley, 1991.
Gorman, Ed,
--Bill Pronzini's Nameless Detective, 1991.
Lovesey, Peter,
--Michael Kenyon's Detective Chief Inspector Henry Peckover, 1991.
Edwards, Martin,
--Cyril Hare's Francis Pettigrew, 1991.
Hart, Anne,
--Agatha Christie's Hercule Poirot, 1991.
Wilson, Barbara,
--Dorothy Gilman's Mrs. Pollifax, 1991.
Algar, Nigel,
--Loren D. Estleman's Ralph Poteet, 1991.
King, Daniel P.,
--Nigel Morland's Mrs. Pym, 1991.
Hoch, Edward D.,
--Ellery Queen's Ellery Queen, 1991.
Raine, Jerry,
--James Lee Burke's Dave Robicheaux, 1991.
Kennealy, Jerry,
--Edward Mathis' Dan Roman, 1991.
Gallagher, Stephen,
--Leslie Charteris' The Saint, 1991.
Grant-Adamson, Lesley,
--Julie Smith's Rebecca Schwartz, 1991.
Mertz, Barbara, Barbara Michaels, and Elizabeth Peters, (really just Barbara Mertz)
--Charlotte MacLeod's Peter Shandy, 1991.
Torrens, Duncan,
--Anthony Berkeley's Roger Sheringham & Philip MacDonald's Anthony Gethryn, 1991.
Barnett-Foster, Adam,
--Jerome Charyn's Isaac Sidel, 1991.
Berlins, Marcel,
--Sarah Caudwell's Professor Hilary Tamar, 1991.
Rahn, B. J.,
--Patricia Wentworth's Miss SIlver, 1991.
Wallace, Robert,
--John le Carré's George Smiley, 1991.
Newman, Kim,
--James Ellroy's Dudley Smith, 1991.
Adrian, Jack,
--Edgar Wallace's The Sooper, 1991.
Symons, Julian,
--Dashiell Hammett's Sam Spade, 1991.
Nolan, Frederick,
--Robert B. Parker's Spenser, 1991.
Aird, Catherine,
--Emma Lathen's John Putnam Thatcher, 1991.
Caudwell, Sarah,
--Patricia Moyes' Henry and Emmy Tibbett, 1991.
Campbell, Robert,
--Robert Irvine's Moroni Traveler, 1991.
Auswaks, Alex,
--David William's Mark Treasure, 1991.
Murphy, Haughton,
--Robert Barnard's Perry Trethowan, 1991.
Steffensen, Jan Bitsch,
--Nicolas Freeling's Van der Valk, 1991.
Olmsted, Helen Esper,
--Loren D. Estleman's Amos Walker, 1991.
Semple, Linda,
--Sara Paretsky's V. I. Warshawski, 1991.
Howe, Melodie Johnson, and Catherine Kenney,
--Dorothy L. Sayers' Lord Peter Wimsey, 1991.
Hart, Carolyn G.,
--Phoebe Atwood Taylor's Leonidas Witherall, 1991.
Gosling, Paula,
--Rex Stout's Nero Wolfe, 1991.
Stableford, Brian,
--M.P. Shiel's Prince Zaleski, 1991.
Fyfield, Frances,
--Michael Dibdin's Aurelio Zen, 1991.