Shadow Girl, by Liana Liu
I loved Shadow Girl. It’s Gothic horror set in the present day—which is hard enough to pull off, in that even an isolated island setting is going to have internet access for human contact and electricity to brighten dark nights—but Liu takes it a step further and sets it in a beautiful, bright, airy summer home. And even with those factors, she nails the classic Gothic feel and creates an oppressive, suffocating atmosphere. NAILS IT.
I loved this book so much that when I saw dissenting opinions on Goodreads I was PERSONALLY OFFENDED.