Lucy Foster stumbles upon a terrifying secret in her friend’s home: a girl and her baby hidden in the cellar. But rescuing them is only the beginning of a nightmare she can’t escape. $0.99 on Kindle.
"Behind a Locked Door" by Sarah A. Denzil was first posted on freebookpromotions.com on October 30th, 2025. Each day we feature new free and discounted Kindle books in the Mystery, Thriller & Suspense genre as well as all other genres.
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