I'm currently reading Murder on Millionaires' Row by Erin Lindsey. This book was released earlier this month.
In Gilded Age Manhattan Rose Gallagher is a clever girl with a good head on her shoulders. Working as a maid on Fifth Avenue, she doesn't forget her roots in the rough neighborhood of Five Points. When her boss goes missing, a boss whom she deeply admires, she knows she can't trust the police to pursue the matter. Despite being warned, Rose takes matters into her own hands and begins to investigate. What she discovers is more than she ever bargained for. A whole new world of ghosts, portals, and luck has opened up and Rose Gallagher's life is forever changed.