Manga Dragon Ball Full Color Saiyan Arc, Vol. 01 Viz

Son Goku is the greatest hero on Earth. Five years after defeating the demon king Piccolo, he’s grown up and has a family. But what is the real reason for Goku’s incredible strength? A visitor from outer space arrives bearing terrible news—Goku is an alien, and the visitor, Raditz, is Goku’s brother! When Raditz turns out to be a ruthless killer, Goku must fight his incredibly strong brother to save his family and the entire human race. A surprising alliance may be Earth’s last hope: Goku will team up with his old enemy Piccolo to save the world!

With the mighty Kaio-ken amplifying his strength, Goku fights Vegeta in a desperate battle to save the world, only to find that the elite Saiyan warrior is even stronger than his own techniques! Goku calls on the Genki-dama, the “spirit ball,” drawing power from every living thing around him. But alone, even Goku is not enough. The last worn-out survivors, Gohan, Kuririn and Yajirobe, rush back into the fray to try and stop the unbeatable Vegeta from destroying the planet Earth itself!