I've been making so many lists! A Little Life was the most powerful thing I read this year (ever maybe), and I loved and hated it in equal measures. Nothing else measures up.
Otherwise: H is for Hawk, Dept of Speculation, Station Eleven, Anchor Point, The Other Side of the World, Six Bedrooms and The Natural Way of Things all completely blew me away.
I was completely swallowed up by Ferrante Fever as well - the finale was probably my favourite reading experience, but it's impossible to really separate them.