The Masters of Spinjitzu are stuck on a comet, having traveled through space to save the World of Ninjago from the Nindroids. As they race through the stars, it becomes apparent that they are not alone on the comet. Something has stowed away... Something not of their world...

Arthur series/Chapter Books.

The Masters of Spinjitzu are stuck on a comet, having traveled through space to save the World of Ninjago from the Nindroids. As they race through the stars, it becomes apparent that they are not alone on the comet.

As Buster attempts to prove to his friends that he saw a UFO in the night sky, he is frustrated by the Brain's disbelief until Buster realizes that the object he saw was really a comet heading straight for Earth.

Longer Arthur adventures written at a third grade level for kids who are ready to read on their own

Paul Hazard’s magisterial, widely influential, and beloved intellectual history offers an unforgettable account of the birth of the modern European mind in all its dynamic, inquiring, and uncertain glory. Beginning his story in the latter half of the seventeenth century, while also looking back to the Renaissance and forward to the future, Hazard traces the process by which new developments in the sciences, arts, philosophy, and philology came to undermine the stable foundations of the classical world, with its commitment to tradition, stability, proportion, and settled usage. Hazard shows how travelers’ tales and archaeological investigation widened European awareness and acceptance of cultural difference; how the radical rationalism of Spinoza and Richard Simon’s new historical exegesis of the Bible called into question the revealed truths of religion; how the Huguenot Pierre Bayle’s critical dictionary of ideas paved the way for Voltaire and the Enlightenment, even as the empiricism of Locke encouraged a new attention to sensory experience that led to Rousseau and romanticism. Hazard’s range of knowledge is vast, and whether the subject is operas, excavations, or scientific experiments his brilliant style and powers of description bring to life the thinkers who thought up the modern world.

It was supposed to be just 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 under siege from deadly alien invaders. The evil Kylarn have shifted the orbits of three asteroids, sending them tumbling toward Earth—and a direct impact will have devastating consequences. With instructions and skills they learn from the mysterious Commander Zota, JJ and her fellow Star Challengers embark on a mission to the asteroids before it's too late, hoping to divert the giant rocks before they strike Earth. But the alien invaders aren't the only enemy—the Star Challengers have to worry about human traitors, too!