Not every day start with a marble and end on the other side of the universe, but for twins Kass and Tycho, it’s precisely one of those days.
Hidden beneath a pyramid-shaped mountain in the forest, they discover a mysterious spacecraft, and before they know it, they are farther out in space than any human has been before them. How will they find their way back home? And are they truly alone on the spaceship? And what is really hiding in the Forbidden Solar Systems?
The quest for Earth sends the twins into a vast, alien universe where they must face dangers, enemies, warlike aliens, cosmic rays, and exploding stars. But the greatest danger of all is something they can’t even see…
The Forbidden Solar Systems is the first of four books in the series about Kass & Tycho.
