Text extraction

Have you tried posting this to http://stackoverflow.com ? That's a better forum for these kinds of questions.

If you were to write a blog post about how to structure the extracted text, that's more the HN thing.

I won't swear to it, but I suspect you're going to have to largely roll your own, and that it will be at least partly heuristic driven. I use Apache Tika[1] to extract text from PDFs and then index it with Lucene, but we don't need to discriminate between various chapters or anything. But I can picture how you could use OpenNLP[2] and some custom code, to break down the chapters.

[1]: http://tika.apache.org

[2]: http://opennlp.apache.org