Her Majesty's Necromancer — C.J. Archer

When bodies go missing from the cemetery, Lincoln and the Ministry of Curiosities investigate. But not Charlie. As a housemaid at Lichfield Towers, she doesn't get involved in Ministry business.
Instead, she conducts investigations of her own. She searches for details about her real mother, and makes inquiries into Lincoln's background. What she learns has the power to destroy the fragile trust they've built, or bring them closer together. As secrets are revealed, and investigations don't go as planned, Charlie finds her necromancy sucking her into a whirlpool filled with betrayal, lies and danger that could jeopardize her friendships and her home.