These are The Avengers Level 1 Reader (World of Reading)

The MarvelHeroes 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. In reading this series, boys will prefect their own power to read.
Meet the Mighty Avengers introduces readers ages 4-6 to the world of Marvel's popular Super HeroTeam that includes Iron Man, Captain America, Thor and the Hulk!

• Super Friends: Flying High (DC Super Friends) (Step into Reading)
• This is Spider-Man Level 1 Reader (World of Reading)
• Just a Little Sick (My First I Can Read)
• Dinosaur Rescue! (Jurassic World: Fallen Kingdom) (Step into Reading)
• World of Reading This is Captain America: Level 1
• Mission PAW (PAW Patrol) (Step into Reading)
• Splat the Cat: On with the Show
• World of Reading: Hulk This is Hulk
• World of Reading Avengers Boxed Set: Level 1
• World of Reading: Black Panther: This is Black Panther (Level 1)