The Lullaby Key

A dead woman's coded message is the only proof of her innocence—and Ellen Brodsky has ten days to crack it. In 1948, Ellen was a cryptanalyst hunting a Soviet mole buried inside America's most secret code-breaking program. Five years later, she's a housewife in Alexandria, subpoenaed before a Senate panel that wants to brand her murdered friend a traitor. Armed with smuggled worksheets, a Yiddish lullaby, and the obsessive indexing habits that once made her indispensable, Ellen must expose the real spy before the government buries the truth—and her along with it.