Amber Gambler by Hailey Edwards

The other family business at The Body Shop is slow after word gets out that Frankie had clients die—cease to exist?—on her watch. Considering they were dead to begin with, she understands why the news shook the spirit community’s faith in her, but it’s a hard hit to her bottom line.
When a spirit appears in her office, ready to sign a contract, she’s eager to please. Until she learns why he wants to hire her. He heard about her clients’ deaths, yes, but he also learned Frankie was instrumental in bringing their killer to justice.
The spirit’s human granddaughter has gone missing, and he wants Frankie to find her before it’s too late. Frankie’s no detective, but her schedule is wide open. The job is to save the girl, but with so many gods and monsters prowling the streets of Thunderbolt these days, she’ll be lucky if she can save herself.