This might seem más difficult than it actually is, but essentially, this is anime creation with a dado template. A great example of this is through Gankutsuou: The Count of Monte Cristo, an anime based off of the novel that bears most of that name. They provided a highly fantasía edge to the series and kept to the same general idea of the story.
There are, of course, several ways tu could do this. For one, tu could just take a dado book o series and modify them to make into an anime. tu could also expand upon a dado book o series instead, using it all as background. One thing I'm considering doing is inserting anime-based fantasía into actual history. Those are just a few examples, and of course, if tu can think of others, the sky's the limit.
For me, the libros I'd be most interested in making into anime are Catch-22 (it would be INSANE), The Old Kingdom trilogy (it practically calls for it), and one based off of the Mongolian Empire that I think would be a lot of fun.