Goodchild, George — The Efford tangle.

Rich and Cowan, 1950. Reprint; 45th thousand. Softcover. Tatty paperback, spine worn with loss at both ends, card covers creased and worn, front cover reattached with archival tape, pages ages tanned, no inscriptions. 256 pages. An Arrow book. Undated but assume early 1950s. Fair.