Octavia gone
(Book)

After his return from space, Gabe is trying to find a new life for himself after being presumed dead-just as Alex and Chase are trying to relearn how to live and work without him. But when a seemingly alien artifact goes missing from Gabe's old collection, it grants the group a chance to dive into solving the mystery of its origins as a team, once again. When a lead on the artifact is tied to a dead pilot's sole unrecorded trip, another clue seems to lead to one of the greatest lingering mysteries of the age: the infamous disappearance of a team of scientists aboard a space station orbiting a black hole-the Amelia Earhart of their time. With any luck, Alex, Chase, and Gabe may be on the trail of the greatest archaeological discovery of their careers... -- from Amazon.