The Light Between Oceans by M.L. Stedman

When Tom Sherbourne returns to Australia after World War I, he takes a job as a lighthouse keeper on Janus Rock, an isolated island off the western coast.  He hopes the isolation will help him to heal from the war.  While on leave back to the mainland, he meets Isabel Graysmark.  The two fall in love and marry.  One day, very shortly after Isabel has had a stillbirth (following two earlier miscarriages), a boat washes to shore with a dead man and a live baby.  Isabel convinces Tom, against his better judgement, to keep the baby and claim her as their own.  This lie has devastating effects on everyone involved.  The book is a reminder that there are many shades of gray between right and wrong and there are no easy answers in life.  It was very well written and I rate it 4 out of 5.  The moral dilemma reminded me of The Memory Keeper's Daughter by Kim Edwards.