Dragon Ball Z, Vol. 19 : Death of a Warrior Volume 19 by Akira Toriyama

Sci-Fi martial arts action!After years of training and adventure, Goku has become Earth's ultimate warrior. And his son, Gohan, shows even greater promise. But the stakes are increasing as even deadlier enemies threaten the planet.

DRAGON BALL Z is the ultimate science fiction-martial arts manga. Awakening to his true power, the once meek Gohan pummels Cell, the former strongest being alive! But rather than suffer the indignity of defeat, Cell has a last desperate option--self-destruct and take the planet with him! Can the Saiyans and their allies save the world from being turned to ashes? With the death of six billion people only seconds away, Goku and Gohan--father and son--must fight together for the final blow...