Dragon Ball Z. Vol. 16 / story and art by Akira Toriyama ; [English adaptation, Gerard Jones ; translation, Lillian Olsen ; touch-up art & lettering, Wayne Truman].
"This book reads from right to left"--Cover p. [4].
"In the original Japanese edition, Dragon Ball and Dragon Ball Z are known collectively as the 42-volume series Dragon Ball. The English Dragon Ball Z was originally volumes 17-42 of the Japanese Dragon Ball"--P. facing t.p.
Summary
Vegeta and Trunks have reached a level more powerful than Cell, so they help Cell fuse with android #18 in order to have a fair fight.