I received an ARC of this book from NetGalley in exchange for my unbiased opinion. 
 Lena Woodward wants to hire private investigator Liam Taggart and his wife, attorney Catherine Woodward, to resolve a 70-year-old mystery. During World War II, Lena's best friend, Karolina, gave birth to twins, and Lena made a promise to Karolina to find the twins if they survived and pass along a message. Lena's son, Arthur, believes his mom's obsession to find Karolina's twins is proof of her mental instability and is suing to gain control of her estate and have her put in a home. 
 I really enjoyed the part of the book where Lena was telling the story of her World War II experience. I felt that it was well written, and the emotions really came through. I was not as big a fan of the parts involving Liam and Catherine, especially when they interacted with Arthur and his lawyers. Those scenes felt extremely flat and unrealistic. Overall, though, those scenes did not detract from my enjoyment of the novel. 
 3.5 stars