[tshering]

@myki
I simply had to quell my curiosity and look at the most recent autoshelf script. So here is autoshelf_on_demand_03.sh. If you want to try it copy it to .adds/kbmenu_user/scripts, and run it by selecting
(home) "user scripts" > "autoshelf on demand 03.sh"

If you want to use the configuration file copy .addons/autoshelf/autoshelf.example.cfg (which I included in the archive for your convenience) to your device, and follow Frostschutz's instructions ("In order to use this file, rename it to .addons/autoshelf/autoshelf.cfg").

Warning: Since I do not have my Kobo reader with me I was unable to test this script myself.
Edit: The first script I uploaded did not work as expected. I therefore replaced it since by the corrected version. This time I did run the script myself and it worked.