3 - RBKC: The Chunked .rabook Container
Books are the reason this project exists, so this is where the e-reader stops being a graphics demo and starts being a reader.
The interesting tension here is that solving one problem creates another. Moving all the EPUB parsing to a host tool makes the device’s job trivial, but it produces a single flat object that is bigger than RAM – so now you need a way to read a piece of it without holding the whole thing. This post is also a useful comparison with the previous one: the two formats put their index at opposite ends of the file, for reasons that are entirely about the producer.
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