Dragon Ball Z volume 4 features story and art by Akira Toriyama.

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 new techniques. To break a temporary stalemate, Vegeta transforms into a giant ape, a King Kong who breathes energy blasts with the force of a nuclear bomb!

In desperation, Goku calls upon the Genki-Dama, the "spirit bomb," drawing power from the Earth, its people, plants, and animals, in an effort to defeat his colossal foe. But alone, even Goku is not enough.The last worn-out survivors, Gohan, Kuririn, and cowardly Yajirobe, must rush back into the fray to stop their unstoppable foe... as the enraged Vegeta vows to not only wipe out the human race, but destroy the planet Earth itself!