The Pavilion at Monkshood — Anne Maybury

Lovely young Jessica Lothian suspected that Luke Herriot, whom she loved, was secretly meeting her strange and beautiful cousin Claudine in the isolated little pavilion.

Yet, Jessica had no proof that Luke was being unfaithful, just as she had no actual proof to back up her other suspicions: that Luke was an important part of the grim past that still clung to Monkshood... that Monkshood was forever doomed unless the murderer from the past be brought to justice in the present.

And Jessica, in her struggle to solve the secret that still haunted Monkshood, is also doomed lest she delve too deeply and discover the truth...