John MacGregor, a daring scientist at the Hawaiian Volcano Observatory and passionate surfer, faces the toughest challenge of his career. Mauna Loa, the largest active volcano on Earth, is set to erupt in just a few days. And beneath the volcano lies a closely guarded secret by the Army that threatens to annihilate all life on the planet if the lava releases it. Alongside the fearless volcanologist Jenny Kimura and a team of experts, Mac fights against the natural disaster and strives to save everything he loves: the island paradise, its people, and ultimately the entire world. Michael Crichton, creator of "Jurassic Park," "Emergency Room," "Twister," and "Westworld," passionately worked on this project for years before passing away far too soon in 2008. His wife, Sherri Crichton, recognized how special this book was and kept her husband's notes and partial manuscript until she found the right author to complete it: James Patterson, the world's most popular storyteller.