Unnatural Causes/The Black Tower (Adam Dalgliesh Mystery Series 3 & 5; An Unsuitable Job for a Woman (A Cordelia Gray Mystery) & Murder in Triplicate (Three Short Stories)

1980, 1st oversized omnibus paper edition, later printing, Scribners, NY. Paperback title, 723 pages. Includes a 3-page introduction by the author. Includes the novels: UNNATURAL CAUSES, AN UNSUITABLE JOB FOR A WOMAN, and THE BLACK TOWER.