Dragon Ball, Volume 6: Bulma Returns! — Akira Toriyama

In the frozen north, Goku's one-man fight against the Red Ribbon Army continues as he storms the perilous Muscle Tower! Can he defeat General White's squad of ninjas, cyborgs, and worse, and save the peaceful people of Jingle Village from their oppressors? Then, Gorku travels to the City of the West to visit his old friend Bulma, who joins him on his quest, bringing her latest inventions. Their quest for the next Dragon Ball takes them around the world to a jungle island in the South Seas...but to get THIS Dragon Ball they'll have to go through General Blue!