"The Sentinels narrowly escaped the collapsing edge of the Divide. They have mustered a few other surviving Sentinels, but with no engines, they have no way to leave the edge of the universe before they starve. Adequin Rake has gathered a team to find the materials they'll need to get everyone out. To do that they're going to need new allies and evade a ruthless enemy. Some of them will not survive."--

When Rip Cantrell, a seismic survey worker in the Sahara, spots a glint of reflected light in the distance, he investigates-and finds a piece of metal apparently entombed in the sandstone. Before long, Rip and his colleagues uncover a flying saucer that has been resting there for 140,000 years. Their discovery doesn't remain a secret for long. The U.S. airforce sends a UFO investigation team, which arrives just minutes before a team sent by an Australian...