Literature in the tradition almost fairytale civilization language eg von Brentano or Grimm and the multiple superposition of layers of meaning, as it is typical for Hesse - is probably very difficult to implement cinematically. Quite regrettably, I have the impression that American filmmakers take up a cultural asset in the self-conception known for their culture - and distort. The balanced flow of the narrative is not at all over the film. Apart from this, the Timeless is not shown, which also constitutes the very essence of the story. On the contrary, the modernist style means the dusty 70s act mannerist, Platt. So if you have only seen the film, which the literary work is warmly recommended. Then you will experience the pleasure spoke authoritative images, philosophical drafts, character and plot descriptions. In the film, but one has the impression that the blurb was filmed.