The Light Between Oceans, by M. L. Stedman

In 1926 Tom Sherbourne becomes the lighthouse keeper on Janus Rock, a lonely spot off the southwestern coast of Australia. It’s a lonely job, with a supply boat only visiting once a quarter, but Tom enjoys it. After a shattering four years fighting in WWI, Tom returned to Australia and began learning the lighthouse trade, attracted by the quiet life, the precision required, and the opportunity to save lives. On a rare shore leave he meets and marries Isabel who adjusts quickly to life on the...