The Split By Sharon J. Bolton

The remote Antarctic island of South Georgia is about to send off its last boat of the summer–which signifies safety to resident glaciologist Felicity Lloyd. She took a job on this isolated island to hide from him, but now that he’s out of prison, having served a term for murder, she knows he won’t give up until he finds her.

A doctor digging into the background of Felicity and Freddie’s relationship back in Cambridge learns that she has been on the edge for a long time. Heading to South Georgia to try to get to her first is the only way he can think of to help her.