Darth Paper Strikes Back by Tom Angleberger

Not only has Harvey created an origami Darth Vader to battle with Dwight's Origami Yoda, Dwight gets kicked out of school and might be sent to the school for juvenile delinquents! His friends prepare a new case file to explain to the school board why Origami Yoda (and Dwight) are needed at McQuarrie Middle School, but Harvey threatens to write a letter proving that Dwight really deserves to be punished. Tommy is doing the best he can, but can he win out over the Dark Side? A great sequel to Origami Yoda!