They Dared The Deep by Robert F. Marx
1968. First Edition. 157 pages. No dust jacket. Blue cloth. Black and whitephotographic plates. Pages are clean and bright, and appear almost good as new. With minimal tanning throughout. Binding has remained firm. Boards are a little rub worn, slight shelf wear to corners, spine and edges. Corners are a little bumped. Spine ends are mildly crushed.