You can actually SCP into the device without any modification. It's under the Copyright section of the device. It'll show you the default SSH password for your device and then you can drop files in there. :)
i don't haven the device but the above sounds like a 10 line shell script to me. slap files in a local directory, execute script, see screen flash on device, items loaded.
Sure, you can SCP all the files you want but even if they're PDFs or EPUBs they won't show up in the interface. (I can't remember if I actually tried this or if I just read it somewhere. Maybe it's worth a shot.)
- Setting up a bit of metadata
- Restarting the system service
it's not quite as simple as `scp file remarkable:/folder`