The library of the dead by T.L. Huchu

Set in a post-catastrophic Edinburgh (near future or alternate?) The Library of the Dead is about Ropa, a fourteen year-old ghostalker of Zimbabwean heritage – count me in! While trying to make a living and care for her grandmother and sister, Ropa takes messages from ghosts to their families. She hears that someone is doing something terrible to children, and this sends her on an adventure that brings her to an amazing library, new friends, magic, and much danger. It had a slow start, but I am fully on board for the series.