First Daughter (en Inglés) - Marlie Parker Wasserman

In the summer of 1895, President Grover Cleveland and his pregnant wife, Frances, retreat to their secluded Cape Cod home, eager to avoid Washington's heat and hassles. The very day that Frances gives birth, their three-year-old daughter vanishes. A ransom note surfaces, demanding a mysterious and peculiar sum. 

Is the kidnapper a political enemy or someone closer to home? Secret service agents chase multiple leads but reach dead ends. Desperate, Frances Cleveland searches for answers on her own. As the hunt continues, the kidnapper carefully plots each move and determines to settle a score. 

The historical record documents threats against the Clevelands, but no actual kidnapping. Yet, what if the president and his wife, known for keeping secrets, concealed a terrifying chapter of their lives? In this gripping blend of fact and fiction, the line between public duty and private anguish blurs in a mother's fight to save her child.