Tech
Parsing and Rebuilding EPUB Files in Python: Lessons Learned
How we handle complex EPUB structures for AI translation without breaking navigation and metadata
At LectuLibre , we built an AI‑powered book translation service. Users upload an EPUB, and our pipeline translates the text using LLMs like Claude and DeepSeek. That sounds straightforward until you have to parse and rebuild a valid EPUB without mangling the table of contents, internal links, or styles.
I’m sharing the real‑world challenge we faced, how we chose our tooling, and the ugly cor...
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