Billie Blaster and the Robot Army from Outer Space — Laini Taylor

Billie Blaster and the Robot Army from Outer Space is an out-of-this-world new middle-grade graphic novel about a genius scientist and her evil nemesis, created by New York Times bestselling author Laini Taylor and cartoonist Jim Di Bartolo.
 
Don't you hate it when your archenemy launches your latest invention into space, accidentally creating a robot army that falls into the clutches of an evil alien emperor? Well, that's how Billie Blaster's day is going!
 
The genius child of two famous scientists, Billie is an inventor extraordinaire and the star of the annual science fair, much to the disgust of her nemesis, Tiny Hector Glum. But now their rivalry has gone too far, and the fate of the galaxy hangs in the balance. Can Billie prevent an intergalactic war that's kind of totally her fault? With her pet goat, Lucy, a giant robot head, and a toilet weasel from a distant planet, she might just stand a chance. Join them on their perilous adventure, in a spaceship without a bathroom.