Threshold

In this thrilling audiobook, paleontologist Helen Sutter finds herself on an extraordinary journey to Mars, but it’s only the beginning. Joined by her husband, A.J. Baker, a super-sensor expert, and her best friend, Madeline, a former secret agent, they embark on a quest that leads them to the mysterious asteroid Ceres and the dangerous moons of Jupiter. As they race to uncover alien technology and navigate shifting alliances, they confront the looming threat of an interplanetary war, all while delving into a new gold rush that could change everything.