The Pen Is Mightier

"When an angry midget at a traveling carnival promises Roger something that could change his life, he never thought it would come in the form of a magic pen. Now, anything the introverted college student writes becomes true, and with its power, he'll finally be able to take revenge on the bullies who have tormented him over the years. There's just one problem. A group of assassins will do anything to get the pen, he accidentally made a entire squad of dancers into slaves, and his best friend somehow got an all-powerful mech." — quoted from this book's product page on Amazon as of 2018-04-05.