Edited by Marie F. Rodell (the series) and Craig Rice (this volume); Vol. VI in the Regional Murder Series (yes, "really"). Cases include William Desmond Taylor, Winnie Ruth Judd, and others -- and the bios of each chapter's author (here, including Erle Stanley Gardner) are a window into a different time.
So is the book itself; this hardcover 1947 first printing has a visibly worn and stained jacket (see pics); chips, splits, tears, and cornerwear, and what remains is somewhat frail. (I can add a wrap; up to you.) The stain at the back did leech into the board somewhat, but no other damage from that -- or really anywhere else inside. A few pencil marks to the flyleaves, but overall in fine reading shape with only mild page toning for its age.
The L.A. volume is by far the dearest and most sought-after of this series; this one's a solid and reasonable addition to your collection. Questions, let me know!