First Blood is best known as the first Rambo movie. As a major launching point in Sylvester Stallone’s career. But before all that, First Blood was a novel by David Morrell. We look at both side-by-side, and tell you: “What’s the Difference?”

A lot changed between the 1972 Canadian psychological thriller novel “First Blood” about a disgruntled and murderous vet named Rambo and the 1982 American film of the same name about . a less murderous Vietnam vet named John Rambo. From major themes to minor plot details, we’ll go through every difference between the book and the movie - get ready to get informed!

Have you read First Blood? Or just watched the movie? (Or neither?) Did we inspire you to think more deeply about Rambo movies? About adaptations in general? Did you enjoy our exhaustive rundown? Do you have other Rambo or First Blood trivia you’d like to share?

What other works would you like to see us explore on What’s The Difference?

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Welcome to What's The Difference, where CineFix takes you step-by-step and page-by-page through all the differences between your favorite movies & shows and their source material. Adaptations are a tricky game, something always gets changed, added, or omitted in the process. Come back every other Wednesday for more What's the Difference!