A Discovery of Witches

Could have been brilliant but was SO. NOT. Did this book have an editor at all?? What kind of fantasy book reveals the existence of ghosts 90% of the way through in a way not at all relevant to the plot up until that point???? (Not a spoiler, just a fact - and evidence that it's terrible, because what kind of book has a reveal like that so close to the end without it being significant in any way to the events up until that point?!)

Deus ex machina after deus ex machina left me frustrated and exhausted. 2 stars for the concept and the descriptive work at the beginning, but zero stars for the characters, the romance or anything past page 150 for that matter.