title_body: How can I manually enter number of "Hours Read" in Kobo Aura HD?
upvoted_answer: The simplest way (still not simple one) is to connect your reader into linux machine and manually edit KoboReader.sqlite file via sqlite3. Now you need to know the structure of this database and try to find place where total hours read are stored. I don't have any Kobo reader so can't help you more.