[Waiting4somethin]

As an alternative to "sleep" you could disable the touchscreen instead. This is possible on any android ereader like the boox series. This has the benefit that you can change page with the volume or page turn buttons while it's "off" (edit - but the downside that it needs powering off and on to reenable the screen, save for less reliable methods). I use Argos Touch Blocker to do this on my A2 Pro and Likebook Mimas.