It takes some time but mastertexts.com has books broken out in chapters, guttenberg project has html and plain text versions of books and manybooks.net (which has a wapsite) offers a bunch of good books and ota downloads of pnc (I think that's what the extention is) files which makes it easy. Other than that use the mobipocket creator to build your own ebook off of doc files.
Hope that helps a bit
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