The document summarizes the key differences between the novel Warm Bodies by Isaac Marion and its film adaptation. Some of the main changes discussed include simplifying the plot and characters for time, removing supporting characters and internal monologues, using imagery like hand-holding to show character development, and altering the ending to give the film broader appeal. Both works explore what defines humanity and how love and connection can help the living and undead find their humanity. Overall the film stays true to the novel's themes but adapts the story for the constraints of the visual medium.