You can continue the story of Primus with part 4 of 5: Phantasms of the Sunless Horizon at https://www.royalroad.com/fiction/85919/primus-phantasms-of-the-sunless-horizon.

The story has been taken without consent; if you see it on Amazon, report the incident.

Only one part left. It's almost finished. Soon.

But if it helps, the finale is likely going to be the longest installment of the series. Unless it still can't beat CotDB. I have no idea how that one got so out of hand, to be honest.