[KJKingJ]

Have you come across LibraryThing before? From what you're looking for in terms of tracking, list management etc it should meet your needs. The only bit i'm not sure about is the ability to subscribe to new releases by an author author or in a series.

[netzone]

Just tried it out for a while right now. It seems to work reasonably well actually, but adding multiple books seems like a chore. Fictfact, as stated below seems to be better in this regard, and it appears you can also subsribe to authors/series there!