The Monsters of Achanalt by Robert Lawson Cassie
While he's claims are generally disputed, Cassie documents here his sightings of a Loch Ness type of monster in Loch Achanalt. Includes 6 photographic plates, none of which captured the elusive beast. This extremely rare title of cryptid lore is a lone first volume, in chipped dust jacket. Owner's signature on the front free endpaper. Excessively rare, this is not an item you are likely to see on the market again.
Aberdeen: D. Wyllie & Son, 1935. 61 pp.
Hardcover in dust jacket. Very good.