In the dangerous aftermath of Napoleon's rise to power, a disgraced Prussian general's daughter infiltrates Parisian high society, determined to expose the French marshal who destroyed her family. Lena von Falkenstein has lost everything—her noble name, her family estate, and both parents to suicide and grief. Disguised as the charming "Helena Valmont," she navigates the treacherous world of Napoleonic politics and seduces her way into elite circles, all while plotting revenge against the calculating Marshal Dumont, the man who falsified military records to destroy her father's reputation. But her meticulous plans grow complicated when she falls for Captain Étienne Leclair, Napoleon's loyal aide who sees beyond her carefully constructed facade to the brilliant strategist underneath. As their forbidden attraction deepens, Lena discovers that Dumont plans a devastating invasion of her homeland, forcing her to choose between personal vengeance and preventing a war. THE CRIMSON THRONE is a sweeping historical thriller perfect for readers of Philippa Gregory and Ken Follett, combining high-stakes espionage with passionate romance against the backdrop of Napoleonic Europe.