The Lightkeeper's Daughters — Jean E. Pendziwol

Elizabeth's eyes have failed. She can no longer read the books she loves or see the paintings that move her, but her mind remains sharp and music fills the vacancy left by her blindness.

When her father's journals are discovered on a shipwrecked boat, she enlists the help of a delinquent, Morgan, to read to her. As an unlikely friendship grows between them, Elizabeth is carried back to her childhood home - the lighthouse on Porphyry Island, Lake Superior - and to the memory of her enigmatic twin sister, Emily.

But for Elizabeth, the faded pages of her father's journal reveal more secrets than she anticipates...

Told from the point of view of its two principal characters: Elizabeth, an old lady going blind in a retirement home, and Morgan, a delinquent youth doing community service at the same home. As time goes on they form an unlikely friendship that sheds light on both lives (and Morgan's history).