Resurrecting this one..
I'm trying to open Calibre with a specific Library. I'm sure I'm doing something wrong, so I need to see if someone can help.
I'm on OS X and my Library is located in /Users/Joe and is called 'DefaultLib
so I figured my command-line would be
/usr/bin/calibre with-library "/Users/Joe/DefaultLib"
[EDIT]

I found my answer 3 minutes after posting.
/usr/bin/calibre --with-library "/Users/Joe/DefaultLib" works like a champ!