Calibre still is a single user program. That means that the cloud is of limited use to give shared access. Instead of sharing just the Calibre library, also share the computer that is running calibre.
Dedicate a computer or a VM and give users remote access to it. Only one user at the same time.
If only read access is needed, then the content server may be used instead. Or a local backup copy of the main library. Not a shared copy!
Last edited by Adoby; 12-01-2012 at 03:38 AM.