We all love to see some tom cruise action and went to see edge of tomorrow. But did you know that edge of tomorrow was based on all you need is kill by Hiroshi Sakurazaka pdf release a while back? The only extremely major difference is the ending of the movie as opposed to the devastating ending in the book. All you need is kill has the same premise of the aliens invading earth and we are trying to prevent the eradication of our species. And the protagonist picks up the aliens ability to reset time same thing in the movie except the aliens and main characters names. The ending though leaves much to question get the book though and see what you think. To say the movie was entire based off the book would be too outgoing but there is definitely some influence.