Dan Rafter 
Gearz #3 [EPUB ebook] 

Karen Chugg just wanted to graduate high school as valedictorian. But it’s not easy to study when the president of the United States sends hooded assassins to kill your three new best friends, who just happen to be deadly robot bodyguards. And how can you be expected to master calculus and physics when you’ve finally fallen in love, and the boy of your dreams is a killer robot with a split personality? Karen Chugg’s life has just become even more complicated.