The Bluebell Pool by Sue Sully

When Nancy Gallimore marries her employer, the gentleman explorer Aubrey Farringdon, she is full of hope. But at Aubrey's family home in Dorset, Nancy must deal with the long shadow cast by his first wife, Augusta.

The bluebell pool, a haven of peace and stillness, is Nancy's refuge. But it's secrets spark Nancy's dangerous obsession with Augusta's life, betrayal and death. Nothing will ever be the same again...

Small size paperback in good condition. Happy to combine postage, just check on the cost first.