If you can live with 0 hours and N books, you can open each "finished" book, go to the last page and then page forward, this will close the book and mark it as finished in the stats. (You can mark the book as finished with a long press in the library, or with the calibre plugin, but at least in some firmware versions this does not affect the stats.) It may be possible to artificially increase the hours by leaving a book open for a few days (turn off auto-shutdown) and then closing it.
Last edited by Jellby; 03-29-2015 at 08:41 AM.
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