Det forsvundne testamente (The Case of the Missing Will) is a short story collection originally published as Poirot Investigates.  The book has several wrinkles and spots on the front and back cover and the first couple of pages are precariously attached to the spine.  Otherwise all pages are clean and firmly attached.  The last page shows the table of contents (see picture).  Soft cover.  160 pages.  7.75 x 4.75 inches.  First published in 1955.  This copy was published in 1973.