Sins of the Father — Jason Blacker

It's 1942 and the war still rages on. Lady Marmalade is staying in London against the advice of her son and her butler. It's to dangerous with Germany's ongoing air raids, but she won't have it any other way. And that's a good thing to, for a neighbor, Ms. Margaret Hollingsberry needs Lady Marmalade's help. She's been getting these awfully upsetting letters that promise vengeance for the sins of the father. But time is running out. Lady Marmalade has less than a week to discover the true identity of the letter writer and to save Ms. Hollingsberry's life. But to do so, she'll have to uncover some dark secrets about Ms. Hollingsberry's upbringing and those closest to her.