The End of the Matter
Alan Dean Foster
 He not only finds this man, Skua September, but also acquires a strange new alien pet Abalamahalamatandra—Ab for short—and is pursued by an assassin squad called the Qwarm. Flinx’s friends Bran Tse-Mallory and Truzenzuzex show up looking for Ab in the hope of finding an ancient weapon, thought to possibly be capable of stopping a rogue black hole; before the three inhabited planets on the black hole's course are sucked in.