Originally Posted by roadstar
... However, the documentation clearly says "access over the net" using the server. This gives the impression that I can access from my friend's house, wifi hotspot...or wherever. It is a little misleading...
It's not misleading, it just assumes you have basic network knowledge.
To get the calibre Web server to display you usually have to port forward from your port, but without knowledge of your network setup it is hard to give advice.