Change The Locks

New locks. Old secrets. A small-town cozy mystery where a fresh key can't guarantee a safe home. Corliss Landing is dressing up for its summer river festival. Locksmith Rachel Harlow is busy with padlocks, last-minute jobs, and a tenant who wants something far more important than a weekend's fun: a door nobody else can open. Delia Mott believes someone has been entering her apartment without permission. Rachel changes the locks and records the work. Then Delia is found dead behind the very door Rachel was supposed to make safe. Now the town is questioning Rachel's workmanship, and every whisper threatens the family shop's hard-earned reputation. The keys say one thing. The building's history says another. To discover who could still get inside, Rachel must trace old rekeys, master-key arrangements, and the small exceptions people would rather forget. Nate Brandt stands behind her professional judgment, but public support won't solve the case. And when Tumbler goes missing amid the festival crowds, Rachel has one more reason to hurry home with answers. Can she expose the truth about Delia's locked apartment before suspicion closes the door on Harlow Lock & Safe? Change the Locks is Book Four of The Master Key Mysteries: a clean, clue-driven whodunit with summer atmosphere, loyal friends, and a locksmith determined to protect more than her good name. For readers who love: • Locked-apartment puzzles and secrets hidden in plain sight • A capable heroine fighting to defend her reputation • Summer festivals, community gossip, and loyal friends • A beloved shop cat and a gentle romantic thread