The spider's house - Sarah Diamond

When Anna's husband Carl tells her that he's been offered a job in a different part of the country, she's as happy to move as he is. While she enjoys city life, her second career as a novelist is going nowhere, and she hopes that in the small Dorset village of Abbots Newton, inspiration might return.
After the move, however, she finds it's quite a different story. With few ideas for her new novel and little else to do, life in the country isn't quite what she'd imagined. But all that is set to change when Anna discovers something unexpected: Rebecca Fisher, the notorious child murderess of the 1960s, was the previous owner of their cottage.
At first, Anna is simply curious and reads up on the case that shocked the nation decades ago. Yet the more she learns about Fisher, the more determined she becomes to reveal the truth, a truth which has remained unexplored for over thirty years.
But someone else has other ideas. As an unseen enemy threatens her marriage, her safety and ultimately her life, Anna finds herself unable to turn back. By understanding Rebecca Fisher, she might just be able to save herself...