Every Tuesday, the town gathered to watch the same window light up at exactly 9:17 p.m. Detective Ellis hated traditions. Traditions kept people from asking questions. He watched the crowd instead of the house. Every week, someone different arrived early. Every week, someone different left smiling. The window was a distraction. The real exchange happened among the audience. After six months, Ellis noticed a pattern. Every visitor carried away a book. Different titles. Same black bookmark. Inside each bookmark was a tiny handwritten instruction. Forgive your brother. Plant the apple tree. Tell her before Friday. Hundreds of lives quietly changed because strangers followed anonymous advice. The bookseller responsible was impossible to identify. Until Ellis found a fingerprint. It belonged to a man officially declared dead twenty years earlier. The town celebrated solving the mystery. Ellis wasn't so sure. Some secrets improve people simply by remaining unsolved. Still, truth has a habit of catching up. The arrests made headlines. The bookshop emptied. The bookmarks disappeared forever. Forever. Now that his identity was revealed, there was no point in selling books anymore.