Publisher's Synopsis
Two times the action, ten times the mayhem, and a billion chances for alien madness! Heatblast and Grey Matter lead the charge in two intergalactic stories from Cartoon's Network's Ben 10.
Which alien's skills pass the ultimate test: fiery Heatblast or brianiac Grey Matter? Follow along in two super-special adventures as ten-year-old Ben takes each alien out for a spin. Worlds are threatened, villains are vanquished, and Ben only bungles up a handful of times!
