Ink Blood Sister Scribe by Emma Torzs

I really enjoyed this book about two half sisters work to protect their dead father’s collection of magical books. It reminded me of things that I liked about magic in the Discovery of Witches series. Esther and Joanna Kalotay are keepers of an impossible secret: that magic exists, and it's channeled through certain enchanted books. Esther and Joanna’s father, Abe, is fanatical about his collection of these books, but despite having devoted his life to magic, he's never been able to figure out how they were written. One terrible day, he tries to enact a spell from a mysterious book and is killed. This tragedy leaves Joanna, who shares her father’s ability to sense magic humming in a book, to tend to the library. Before he died, Abe had warned Esther, who is mysteriously immune to all magic, that she must take care never to stay anywhere for longer than a year, always leaving on Nov. 2, or she will risk being hunted down and killed by the same people who murdered her mother. The two discover many truths and some things that were false along the way to a successful collaboration to save the library.