Book excerpt: In Sandcastles by the Sea, Sheridan takes us through a thread of memories she shared with her late grandmother. Her grandmother, Mary Strang, was a hilarious and strong-headed New Yorker with a passion for detective novels, a long day at the beach, and never missed an episode of Jeopardy!. It's a story about finding solace in the past, the enduring impact of small moments, and the way love continues to guide us, even when the ones we cherish are no longer with us. Sandcastles by the Sea reminds us to treasure each other and to always hold onto our memories even when they can be painful to remember.