I don't know what a "series database" is, but as Helen says there are metadata plugins available like Goodreads which will populate the series field for you.
As for an author database, that idea has been thrashed around in quite a lot of detail in this thread below (and a few others if you do a search).
https://www.mobileread.com/forums/sho...d.php?t=139133
It resulted in chaley adding a change to calibre allowing you to link an author name to wikipedia or some other external site of your choice. So each and every user does not have to maintain those author details themselves.