Used paperback in good condition. Cover and pages show minimal wear. Pages with normal age discolouration.  Binding coming loose at bottom of first ten pages but pages still secure. 220 pages. Published by Pan Books, 1974. ISBN 0330238876.

When Tristan Poole moved into Colwyn Court, in a remote Welsh seaside village, was it to form a nudist group? Or was it, as Nicola Morrison suspected, for something much more sinister?

What was the hypnotic effect Tristan had on Lisa, Nicola’s glamourous young stepmother?

What was the explanation for the sudden illnesses, accidents and deaths at Colwyn?

And what was Tristan planning for Nicola?

As Lammas night approaches, and the true, supernaturally evil nature of the group is revealed, Nicola is drawn into deadly danger.