The 'monsters' grouped together in this work have an easily recognisable similarity - they are all hairy ape-like creatures which pose different different degrees of challenge to human categorisations and expectations. Included are several putative creatures deemed to be on the outer fringes of scientific acceptibility. the Abominable Snowman, Bigfoot, Loy's Ape, and there are two avowedly fictional monsters - King Kong and the Yahoo. This work continues Lester's project on the analysis of cultural meanings of monsters, evidenced in 'The Meaning of the Loch Ness Monster' and 'The Great Sea Serpent Controversy'.