Both Universal and User Accounts

[Pebah]

In my "book" application I want to have:
1. A universal account--to handle text and other data all users will see
2. A user account--to handle the user's personal data (bookmarks, etc.)

How is this done? I see in the docs, "Accounts and Authorization," descriptions of both, but it seems to describe it as either universal or user; I need both simultaneously.

Thanks!