I picked this up because I'm so familiar with the Ghibli film, I had to know the source material.

Without bashing the movie, which is wonderful in it's own right, I just have to say that I wish the movie included more of the book than it does. As is normal, the movie changed and omitted a lot, which is unfortunate. The book breathes so much more life into what are already lively characters. Anyone more familiar with the Ghibli movie should definitely give this a read, it paints a much fuller picture of the story.