The year is 2239, and humanity stands on the brink of its greatest expansion yet. From the mining outposts of Ceres, the crew of the Aurora Venture launches toward Jupiter's moons-Ganymede, Europa, and Callisto-with orders to establish permanent survey bases and expand the reach of the Outer Worlds Fleet. But the Jovian frontier is far more dangerous than expected. Lysa Hartmann battles a resurging claustrophobia that threatens to undermine her ascent through the Fleet. Dr. Senzo Marik, haunted by a past tragedy on Ceres, faces unsettling seismic anomalies beneath Europa's ice sheets. Engineer Eila Trujillo fights a losing race against the environment as melt shafts collapse and radiation storms close in. And Captain Roald Jin must decide how far he's willing to go to save his people-even if it means sacrificing mission-critical equipment.When a catastrophic icequake traps crew members deep under Europa's surface, the team braves unstable tunnels, rising meltwater, and collapsing caverns in a desperate rescue. Joined by late-arriving specialist Grigor Valko, they discover that survival on the frontier demands both courage and unbreakable unity. The Jovian Frontier is a gripping tale of exploration, danger, and the enduring human spirit-an opening chapter to a sweeping saga of expansion toward Saturn and beyond.