Books and Bone - Tombtown, #1

A Librarians-and-Necromancy Fantasy Novel with Small Town Charm in a City of the Dead The others believe in blood and bone. Ree believes in books. She manages the libraries and draws maps for the denizens of her hometown, a secret society of necromancers hiding in a sprawling underground crypt. Though they look down on her for not practicing their craft, Ree has bigger ambitions than raising the dead.
She's going to resurrect therianthropy, the ancient magic of shapeshifting. Or at least -- she'll do it if it really exists. And if she can find the books that prove it. But Smythe, a chatty historian from the world above, stumbles into the crypt and takes a curse meant for Ree. Now she has to find a way to save him, keep the townsfolk off her back, and convince her necromancer parents that shapeshifting is a viable career path. Ree is certain that if she and Smythe combine their scholarly skill sets, they'll find the right books to solve their problems.
But Ree's search for power might put the entire town in danger, and her father and the other townsfolk want Smythe dead lest he reveal their home to a world that hates them. A dark and sweet story with an asexual protagonist and a touch of romance.