for mystery books you need to read all holly jackson's collections. it's called a good girl's guide to murder and has 5 books in total! (the second one has highest rating for me) aaand the silent patient by alex michaelides. i just finished that last week in one sitting explained how page turner this book is! the plot is quite similar but you will see from the therapist point of view. check it out and you would thank me later! ☝🏻