In the House of the Seven Librarians

When an old Carnegie library is closed, its seven librarians refuse
to abandon their home. They lock the doors, and the forest
grows around them like a cloak, sheltering them from the rest of
the world. But their lives are changed when a book of fairy tales
is found in the Book Drop, very, very overdue. The payment? A
first-born child.
In the House of the Seven Librarians is a timeless tale for anyone
who spent a childhood in the refuge of the public library, or who
believes that a world full of books is a truly magical place.