This isn‘t a "gripping psychological thriller." The writing-good. Plot predictable. It's about identical twin sisters Elli and Tia. For the past 15 years, Ellie only sends letters. No visits. The facility Tia has been in closes suddenly and Ellie is basically forced to allow her sis to move in with her and her husband Will. It was still an enjoyable, quick read that passed time well. 3/5. I got this from Netgalley for an honest review.