The Officer's Lover

I've read The Officer's Lover by Pam Jenoff which is a "murder mystery" set in London. Jordan Weiss, an American intelligence officer, returns to London for work and becomes embroiled in a mystery as to how her college boyfriend, Jared, died 10 years before. There are connections to the case she is currently involved in - Albanian mafia etc. Who does she trust? For an "intelligence" officer, Jordan seemed to be lacking in that respect. There are twists and turns till the final twist - good "beach read". Even the title is a "mystery" and doesn't fit the story. 31/2/5