Disney CEO received a call from Apple's Steve Jobs about Iron Man 2.
Jobs disliked the film, despite its success.
Iger writes in his book that he knew the film was not a masterpiece.
Iger also documents that he couldn't let Jobs feel he was always right.
The negative review did not harm the popularity of Marvel films.
Iron Man 3 was a bigger billion-dollar hit than Iron Man 2.
Steve Jobs and Bob Iger were friends throughout their careers.
Iron Man is a popular character in the Marvel Cinematic Universe.