Nice to provide hardware hints and designs but geez that is almost the least of it. Cleverest hardware still only gets you a thumb drive full of page images. Now what? There needs to be a software workflow ending with a readable book in PDF, EBOOK or MOBI format, and there are many, many choices to be made along that path.

Edit: "Finishing a book" is discussed at a very superficial level here: https://vimeo.com/user33752051 at about 1:00:

"In order to turn these raw images into an ebook, the very minimum you need to do is A, you need to rotate them, B you need to crop them down to use the page [?], and C you need to combine them into one document like a PDF... You can do OCR to make it searchable ... color correction... de-skewing, de-warping ..."