Suspicions and theories abound, but they'll never find the answers without investigating, and for that they'll require some new gear, including space suits, metal detectors and ground penetrating radar. If these dead worlds truly were inhabited by the race they called the creators, then they not only need to find that out for sure, but they also need to find out who destroyed them, and why.
Also, in an effort to repair a relationship that had grown distant, Jarrod, Derek, Tina and Sarah invite Patricia to come down to the cabin with them for a little vacation so they can reconnect and get things back to the way they were back in the early days. While they're there, they head out to explore an as of yet unexplored dimension and find a world that's beyond even their wildest imaginations, as well as a mineral that could either be the key to producing limitless energy, or the catalyst of their own destruction.
Ghost Worlds is book 8 of the Unseen things series.