Andy Nebula: Double Trouble is the sequel to Andy Nebula: Interstellar Rock Star.
Teenage musician Kit is no longer Andy Nebula, interstellar rock star. In fact he's no longer a star at all. Reduced to playing dingy dives on Earth, he agrees to his friend Meta's request to go back to being Andy Nebula for a one-time benefit concert...only to discover that someone else in the galaxy is passing himself off as Andy Nebula instead. Soon Kit; Meta; and their friend, Rain, the orange, tentacled alien cop, find themselves caught up in an interstellar assassination conspiracy - with nothing less than the peace of the galaxy at stake!