The Blue Hour by Paula Hawkins

The propulsive and powerful new novel from the #1 bestselling author of The Girl on the Train

Welcome to Eris: an island with only one house, one inhabitant, one way out. Unreachable from the Scottish mainland for twelve hours each day.
Once home to Vanessa: A famous artist whose notoriously unfaithful husband disappeared twenty years ago.
Now home to Grace: A solitary creature of the tides, content in her own isolation.
But when a shocking discovery is made in an art gallery far away in London, a visitor comes calling.
And the secrets of Eris threaten to emerge….

A masterful novel that is as page-turning as it is unsettling, The Blue Hour recalls the sophisticated suspense of Shirley Jackson and Patricia Highsmith and cements Hawkins’s place among the very best of our most nuanced and stylish storytellers.