Sparks!

"Charlie and August, the two cats that control the mechanical superhero dog, Sparks, are keeping the city safe. But when a second, evil Sparks shows up and starts causing trouble around town, everybody blames the real Sparks. Determined to prove that Sparks is still the hero everyone can count on, Charlie and August set out to uncover the shocking truth about who is responsible for all the chaos"--Book jacket flap

August is a brilliant inventor who is afraid of the outside. Charlie is a crack pilot who isn't afraid of anything. Together these pals save lives every day. They also happen to be cats who pilot a powerful, mechanical dog suit! Always eager to leap into danger, this feline duo have their work cut out for them as they try to thwart Princess, an evil alien bent on enslaving mankind. Don't let the fact that Princess looks like a cute, diaper-wearing...