own book access?

HI,
Thanks for this module. It is something i really need for my website actually.
But i have a little problem. Dunno if it is my config or by design.
The website users with the admin book access perm may access book access for every book pages.
I would expect those users to be able to modify their own books or the one they have an editing perm, but not otherwise.
A regular user to be able to modify an admin only edit book doesn't make sense to me.
Am i right? Or i missed something?
Thanks!
pht3k