The Left-Handed Twin by Thomas Perry

Sara Doughton comes to Jane Whitefield so Jane can help her disappear. Sara is on the run because she testified in court that her boyfriend, Albert McKeith, murdered someone. Sara thought she would be safe with Albert away in prison--but Albert is found not guilty and wants to punish Sara for her betrayal. For years, Jane has helped people disappear and worked to find new identities and lives for them. So when Albert is put in touch with a Russian named Porchen to help find Sara, Porchen realizes that the focus of his search should be on Jane, not Sara, since Jane has priceless information about the people that she's helped hide over the years. The Left-Handed Twin is the cat and mouse game of Jane versus the Russians, told in Perry's usual breakneck style. A welcome return to the Jane Whitefield series. It will be published in November.