Edad de hielo (Earthdivers, 2)

When Martin and Tawny's children disappeared, the couple ventured into the wilderness to find them at all costs. However, they encountered another group of explorers claiming they were going to save the world by traveling back to 1492 through a cave portal to prevent the creation of America—an idea that defied all belief until the grieving parents were lured into the cave and vanished into thin air. Now alone, Tawny must adapt to the wild swamps of prehistoric Florida, around 20,000 BC, and the awe-inspiring, bloodthirsty megafauna is the least of her problems when she becomes caught in a war between a Paleo-Indian community and an occupying Solutrean force. Tawny's odds of survival plummet, but she's a mother on a mission…and she clings to the hope that the cave brought her here for a family reunion.