ebook-convert
node.js wrapper around calibre's ebook-convert command
file-type
Detect the file type of a file, stream, or data
epub2md
A epub parser that also can convert epub to markdown using the command line
epub2
Parse ePub electronic book files with Node.JS
textract
Extracting text from files of various type including html, pdf, doc, docx, xls, xlsx, csv, pptx, png, jpg, gif, rtf, text/*, and various open office.