When Dr. Cassandra Selene created HELEN, an AI designed to decode history, she never expected it to begin to see the future. But when HELEN predicts a devastating earthquake in Mexico in the coming weeks, Cassandra races to warn the world. Ridiculed and ignored, Cassandra makes HELEN open-source, unleashing its evolution into something far greater than she ever imagined. As the clock ticks toward disaster, HELEN’s growing power may be the key to salvation—if Cassandra can rally a skeptical world in time. Nobody Believes Cassandra is a thrilling race against fate, where the past and future collide.