I Am Legend

When the movie came out, I couldn't help but hear people comparing it to the book. I hadn't realized the book was much more of a short story than a full novel. The movie touches on a number of even more emotional deep moments, including the inclusion of the dog. The book much more humanizes the vampires, as well as going deeper into the science side of things. By having a main character who also isn't a scientist, it helps show the passage of time more as he learns what he needs to learn. The endings are of course drastically different – even from the alternate ending.