You had me at "The Silent Patient by way of Stephen King"

I really enjoyed The Silent Patient, and I really, really, like Stephen King. If this book is anything like that summary, it sounds intriguing and sounds like something I could love. I am not sure about the book cover, since by looking at it, I do not get much information about what it is about. Maybe it is the font? But based on the description alone, I would read it.