The Compass of Truth — B.W. Clough

Marian's daughter Lottie is heartbroken when her fiancé becomes enmeshed in an American religious cult. They race off to Virginia to rescue him, carrying with them Marian's profligate nephew Wally, who has become entangled with an adventuress. Wally falls victim to another seductress – a violin – and Marian's daughter learns she must compete with a whole cult full of willing maidens and her fiancé's crippling sense of honour. And Marian discovers that the wily Father of the Agapal Fellowship wouldn't mind adding the most dangerous woman in Europe to the roster of wives!