If anything it would be "Peter Brett • The Demon Cycle • " because it currently uses "separator at the end" to identify shelves created by autoshelf (and to be removed if the folder no longer exists, or on uninstall).
It's not possible currently because it's hard coded but I can add such an option. Not sure if the • character would actually work, never tried it.
Also there probably would be confusion if the character you pick also appeared in a folder name. That's why the default choice is / as that is the directory separator character reserved for this purpose...
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