The Uncorrected. The Ledger Cycle, Book 1, #1

Mara Voss finishes dead men's books. A ghostwriter of fifteen years, solitary by design, she comes to the remote Appalachian town of Ledger to complete the unfinished testament of a prophet no one will quite explain - and finds a place that buries its old and never, in a hundred and thirty years, its young. The town keeps a ledger. It has kept one for generations. And what it records is not births and deaths but a debt - owed to something beneath the valley that does not hunger, exactly.
It wants to become. It has spent a century learning to be human from the people, the objects, and the books the town has given it, one careful lesson at a time. It can sing the children's counting rhyme now. It has learned to wear a shirt. It is getting better. The deeper Mara digs, the more she understands that she was not hired. She was chosen - for her isolation, for her craft, for the one thing a finisher of accounts can teach a thing that has learned everything except how to end.
Some names a town sets down on purpose. Some debts reach forward as easily as back. And in Ledger, the account is never closed - only continued, in a hand that grows, page by patient page, more human, and less its own. You came looking. That was always the point.