To read this book as is at face value, it's a haunted house story, where a house is very much the sort of demented evil entity of its own, strongly reminiscent of the one in the first season of American Horror Story. However, the author's note in the end, which isn't really a note so much as a deeply personal extensive (about one tenth of the book's total)essay on history of abuse and why she writes, and the story comes across in retrospect as something of her personal exorcism. It works as both, though I seem to have preferred the former. Quieter psychological sort of horror.
I must say this book just wasn't for me but if you enjoy a horror story than this book is for you. I found the book very well written and very creative/orginal. I would recommend this book to anyone that enjoys the horror genre.