Halfway to the Grave by Odessa Hywell

It’s surprising how easily a person can get used to telling a ghost to f—k off. And how quickly it gets old.

Sekani Aelor, private investigator, can see the dead—and he’s currently being haunted by a pretty, sassy Ghost Boy who can’t remember his name, much less how he died.
Three weeks and one broken coffee machine later, the former homicide detective is ready to commit murder. But you can’t kill the already-dead, just help them with their unfinished business.
In order to rid himself of his unwelcome house guest, Sekani will have to figure out what that business is.
On his quest for answers, Sekani stumbles across talented art student Callum Maslow. Someone wants Callum dead. They’ve tried once already; a second attempt may get the job done. As the questions pile up and answers seem further and further away one thing is clear—time is running out for Callum.
And for Sekani’s ghostly stalker.