If your looking for a cozy horror sorry this book by Rikki Godwin is  just that!
 
When a sixty years dead and  lonely ghost meets the spirit of a child, she’s forced to confront the monsters haunting her to provide the child with companionship. Whether by finding others trapped in-between as they are, or contacting the girl’s living father using a smarmy paranormal investigator hunting for fame, she’s determined to succeed in her task.

But the ghost’s memory isn’t what it used to be, and reality fades more by the day. The monsters are growing more resolute. She’ll have to reunite the child with family before she forgets her mission…and herself.