The spellbinding new Robert Langdon thriller from the author of The Da Vinci Code. Harvard symbologist Robert Langdon travels to the Guggenheim Museum Bilbao to witness a revelation promised to “change the face of science forever.” The announcement is to be made by Edmond Kirsch, a brilliant tech magnate whose radical ideas have sparked global controversy. But the carefully staged event descends into chaos before the discovery can be revealed. Forced to flee for his life with museum director Ambra Vidal, Langdon embarks on a dangerous race from Bilbao to Barcelona to uncover a cryptic password that unlocks Kirsch’s secret. Pursued by a relentless enemy, they navigate hidden history, religious symbolism, and modern art, following a trail of enigmatic clues toward a truth powerful enough to reshape humanity.