dragon ball z, vol. 1: the world's greatest team  <p>son goku is the greatest hero on earth. five years after defeating the demon king piccolo, he&apos;s grown up and had a family--he&apos;s married, and he has a child, son gohan. but what is the real reason for goku&apos;s incredible strength? a visitor from outer space arrives bearing terrible news--goku is an alien, and the visitor, raditz, is goku&apos;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&apos;s last hope: goku will team up with his old enemy piccolo...archenemies united to save the world!</p>