"In this action-packed pop-up book, see your favorite super heros leap off the page. The Avengers have assembled to fight a new evil threatening humankind--the robotic menace known as Ultron! Learn how Iron Man, Captain America, Thor, the Hulk, Hawkeye and Black Widow became a team and find out what special skills each brings to the ultimate group of heroes--the Avengers! Iron Man flies, the Hulk smashes, and Captain America and Thor swing into action in this eye-popping book" -- Unedited summary from the book.

Cover title.