The Marvel Heroes of Reading line of early readers is designed to offer reluctant readers, specifically boys, books that they will want to read by featuring characters they love. The series is broken into three levels that invoke the rigorous training courses their favorite Marvel heroes must engage in to perfect their super powers. Iron Man must gather a new team of Avengers to save his friends, Captain America, Thor and Hulk from the evil robot, Ultron. He meets Black Widow, Hawkeye, Scarlett Witch, Quicksilver, Falcon and Vision. This new band of heroes must defeat Ultron.