After an exhilarating field trip to the local Challenger Center, JJ Wren and her friends are hand picked by the mysterious Commander Zota to become Star Challengers-sent into the future on special adventures to a moonbase, a space station, and the asteroids. Their mission is to learn high-tech skills... and save the human race from an imminent alien invasion

June Scobee Rodgers Presents Star Challengers Book 2: Space Station Crisis The Star Challengers, a group of talented young people bound together by a common interest in the space program, return to the Challenger Center for their next mission. Mysterious Commander Zota once again sends them into the future, and this time they will work aboard the International Space Station Complex. They will live without gravity, orbiting high above the Earth-and defend humanity against a ruthless alien invasion

June Scobee Rodgers Presents Star Challengers Book 1: Moonbase Crisis After an exhilarating space simulation field trip to the local Challenger Center, four talented students are hand picked by the mysterious Commander Zota for a special adventure-to travel to the future and a real moonbase in trouble, where these new "Star Challengers" will learn skills to save the human race

June Scobee Rodgers Presents Star Challengers Book 3: Asteroid Crisis It's just supposed to be an educational field trip to the Challenger Learning Center, but JJ Wren and her friends find themselves transported into the future, to a time when the human race is besieged by deadly alien invaders. The evil Kylarn have shifted the orbits of three asteroids, sending them on a collision course with Earth Using skills learned from the mysterious Commander Zota, JJ and her fellow Star Challengers embark on a mission to deflect the deadly asteroids before it's too late. But the alien invaders aren't the only enemy: the Star Challengers have to worry about human traitors, too....