I just watched the last episode and was wondering if there was a book or some online papers where Season 3 is explained?

There are so many open story lines : the mill, Ed and Nadine, Donna and James, Ghostwood etc.

I would like to know what was intented to happen to all those different stories.

There was very little intended to happen; by this point they knew the series was going to be cancelled.

Robert Engels talked that there were vague notions that Cooper/Bob would be wrapped up within a few episodes, then the series would have fast forwarded a few years, with Cooper working as a pharmacist (as I recall, not sure!), along with some nonsense about Mike and Bob being from a planet made of creamed corn.  All just idle talk really.

There was however a planb to make a graphic novel for the third season, but it never came to fruition (concept art exists on the net somewhere, I hope someone else on the board can remember the artist?)

However, this board is chock full of theories and interpretations about the final episode.

Thank you. I just hope there will be a novel or something coming out.

There are so many open story lines not just Cooper/Bob.