Evermore by Ken Sanchez

River Hayes had spent years alone with the ocean, tracking the fragile recovery of a coastal ecosystem—and avoiding the kind of loss that once shattered his world. But everything changed the morning he found a letter sealed in wax, bobbing in the surf. It was addressed to him. Signed by a man named Finn. And filled with memories of a love River couldn’t remember living.
Finn Torres didn’t know why he kept waking up with ink-stained fingers and finished projects he couldn’t recall completing. Or why dreams of saltwater and green eyes haunted him with the weight of something lost. But when River walked into his bookshop carrying a letter Finn had no memory of writing, something inside him recognized the truth—even if his mind couldn’t explain it.
As strange messages, missing memories, and impossible familiarity pull them together, River and Finn must navigate the blurred lines between science and mystery, grief and healing, past and possibility.