Our Lady of Mysterious Ailments

Opening up a world of magic and adventure, Our Lady of Mysterious Ailments by T. L. Huchu is the second audiobook in the Edinburgh Nights series.
Ropa Moyo's ghostalking practice has tanked. Desperate for money to pay bills and look after her family, she reluctantly accepts a job to look into the history of a coma patient receiving treatment at the magical private hospital Our Lady of Mysterious Ailments. The patient is a teenage schoolboy called Max Wu, and healers at the hospital are baffled by the illness which has confounded medicine and magic.
Ropa's investigation leads her to the Edinburgh Ordinary School for Boys, one of only the four registered schools for magic in the whole of Scotland (the oldest and only one that remains closed to female students).
But the headmaster there is hiding something and as more students succumb Ropa learns that a long-dormant and malevolent entity has once again taken hold in this world.
She sets off to track the current host for this spirit and try to stop it before other lives are endangered.
A Macmillan Audio production from Tor Books