50 Essential Mystery Novels That Everyone Should Read
The Woman In White by Wilkie Collins: I highly recommend this large tome. It's worth your time. I love a mystery that I am unable to unravel until the author allows. And this kept me rapt until the last.
I love all of Kate Morton's novels but this one is my favorite. She writes mystery novels that rely heavily on flashing forward and back in time in the UK. They are all slightly Gothic, painstakingly plotted, and romantic to some degree. I highly recommend them to Anglophiles and mystery/romance lovers everywhere.