Collects the entire 'Knuckles Returns' storyline from Sonic Universe #9-12. Enter the Sonic Universe alongside Knuckles the Echidna! Rad Red is hot on the trail of his arch-nemesis, Dr. Finitevus. What he finds, however, is an ever-deepening mystery! But before he can investigate further, the newest Dark Egg Legion chapter attacks! To save Angel Island, Knuckles must team up with the Downunda Freedom Fighters - as well as Dr. Finitevus? New faces, new twists and surprises abound, and you cannot miss the thunderous showdown at the end!