Wolf Worm by T. Kingfisher

 She took a job in a mansion deep in the woods…

and discovered something feeding beneath the skin.

In 1899, Sonia Wilson is desperate for work

after her father’s death leaves her with nothing.

So when a mysterious scientist offers her a job

illustrating insects at his isolated North Carolina estate,

she accepts immediately.

But the deeper she settles into the manor,

the stranger everything becomes.

Animals behave unnaturally.

The woods feel alive.

And people whisper terrifying stories about “blood thieves.”

Then Sonia discovers the truth:

The doctor’s experiments have created something horrific—

parasitic creatures that burrow into human flesh.

And she may become the next victim.