Brand, Christianna,
--Miss Marple - a Portrait, 1977.
Crispin, Edmund, (Robert Bruce Montgomery)
--The Mistress of Simplicity, 1977.
Fremlin, Celia,
--The Christie Everybody Knew, 1977.
Gilbert, Michael,
--A Very English Lady, 1977.
Hughes, Dorothy B.,
--The Christie Nobody Knew, 1977.
Jenkinson, Philip,
--The Agatha Christie Films, 1977.
Keating, H. R. F.,
--Introduction, 1977.
--Hercule Poirot - A Companion Portrait, 1977.
Lathen, Emma,
--Cornwallis's Revenge, 1977.
Symons, Julian,
--The Mistress of Complication, 1977.
Trewin, J. C.,
--A Midas Gift to the Theatre, 1977.
Walter, Elizabeth,
--The Case of the Escalating Sales, 1977.
Watson, Colin,
--The Message of Mayhem Parva, 1977.
Weaver, William,
--Music and Mystery, 1977.