Terra: Elements, Book 2 (Unabridged‪)‬

Getting out of Gaia Sur was almost as hard as getting in, but there's no going back now. Jazwyn Ripley and her friends have no choice but to venture into the caves and tunnels underneath the ocean floor as the messages they've been receiving get stronger. Tensions rise and loyalties are tested when another of their crew is captured along the way, and one critical choice means following unlikely allies down a path most would never dare - across the seven biomes of "The Rush" - which, if they survive, will either lead to freedom or imprison them forever. In the center, the only way out is through.