The text for by Michelle Paver refers to the fourth book in the popular young adult series Crónicas de la Prehistoria ( Chronicles of Ancient Darkness ).

Torak has been declared an outcast after his secret—the "Soul-Eater" mark—is revealed. He flees to the Ice River, pursued by the Wolf Clan and other hunters, while trying to find a way to clear his name and stop the rising darkness.

The book is widely available in digital formats on platforms like Google Play Books and Amazon Kindle.