Buster tries to convince Arthur, the Brain, and his other friends that he not only saw a UFO but also a comet heading for the earth.

"The great city of Tova is shattered. The sun is held within the smothering grip of the Crow God's eclipse, but a comet that marks the death of a ruler and heralds the rise of a new order is imminent. As sea captain Xiala is swept up in the chaos and currents of change, she finds an unexpected ally in the former Priest of Knives. For the Clan Matriarchs of Tova, tense alliances form as far-flung enemies gather and the war in the heavens is reflected...

"When dark comet UD3 was spotted near Jupiter's orbit, its existence was largely ignored. But to individuals who knew better -- scientists like Benjamin Schwartz, manager of NASA's Center for Near-Earth Object Studies -- the threat this eight-kilometer comet posed to the survival of the human race was unthinkable. The 150-million-year reign of the dinosaurs ended when an asteroid impact generated more than a billion times the energy of an atomic bomb....

"Haylee and Comet share one simple wish: a friend. And as with all great best-friendships, the universe brings them together in the right place at the right time. With each adventure, Haylee and Comet learn about what it takes to grow a strong and long-lasting friendship: accepting their differences, discovering the things they share, communicating with honesty, and being open to forgiveness. And just maybe, there'll be some surprises along the way."--Page...