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I moved these posts to a new thread, because the advice given to Sandra4855 is somewhat contrary to that given in the original 2012 thread.
To clarify the prior responses - the default library will be created in the user's Documents directory, and the configuration in the user's %APPDATA% directory.
If users wanted to share the same configuration data they could do so via the use of the CALIBRE_CONFIG_DIRECTORY environment variable.
@
Sandra4855 - If you're not inclined to create multiple Windows User accounts because of the administration burden, another way to do this might be to use
Virtual Libraries .
That could provide a user interface something like this:
That would also address the content server issue raised the
theducks, the content server 'knows' about virtual libraries.
My only caveat is that I don't know how a Virtual Library solution would mesh with your Kindle Paperwhite devices and the Amazon walled garden. Others may care to comment on that.
BR