"Breathtaking. Gripping. Based on true events." At the legendary Château de Fontainebleau near Paris, once the seat of French kings, a murdered art dealer is found within its ancient walls. Clues suggest he was on the trail of two priceless lost paintings—one by Leonardo da Vinci, the other by Michelangelo. The stolen masterpieces ignite a dangerous chase that draws out secret forces willing to kill for what has remained hidden for centuries. But his death is only the beginning. Because who hasn't dreamed of discovering a lost treasure in a centuries-old castle? Join Professor Cariello as he unravels a web of art, ambition, and murder through the shadowy halls of Fontainebleau and the surrounding dark forests once immortalized by poets. With rich atmosphere, historical depth, and unforgettable twists, this gripping thriller leads readers into the heart of a mystery that could rewrite art history. For fans of historical intrigue, lost masterpieces, and chilling crime—this is a journey you won't forget. "Couldn't put it down!" "Dark, smart, and addictive." "If you love Dan Brown or Umberto Eco, you'll love U.C. Ringuer."