Hi Tortog,
Thanks for going first and being the guinea pig, so to speak.

In short, there is a free license available to publish supporting material for DCC RPG. Interested parties should contact me. The folks you'll see posting on this forum (and what you've seen so far is just the tip of the iceberg) have a ll signed that license and decided to take the plunge.
What we're discussing here is
publishing, which is different from
writing or
designing. Publishing is the entire process, both creative
and business. Some folks find they really prefer one side or the other; others discover they enjoy all parts.
For those of you who strictly prefer the creative side, you'll be happy to know that in 2012 there will be published submission guidelines for writing DCC RPG adventures. And there will be an adventure design contest. That one will be a lot of fun.

But that is all yet to come.
Now, to answer your specific questions...
Tortog wrote:
So I guess my first question is: is the 3PP offered only to those with established track record as a publisher?
The license is free and available to anyone who wants it, whether with a track record or not. There is an approval phase, such that I need to approve the final product before it's released. If you're experienced that approval phase will probably be easier. But as long as your goal is "quality product" you'll probably do okay on the approval phase.
Tortog wrote:
What I really want to do is write novels within the Aereth setting that I've built, but I've reached the point where I really can't go much further without permissions from Goodman Games.
This is the kind of material that could potentially be covered under the free license. I will warn you, though, that novels are not the easiest kind of product to sell to gamers. For all the interest in fantasy literature among gamers, my past experience has been that they buy a lot more games than novels. But everyone's mileage may vary.
Tortog wrote:
A spell & monster compendium: I have about 40 pages of data that needs to be organized and could be further expanded.
This, I think, could potentially be of a lot of interested to DCC RPG fans, and is exactly the kind of 3PP offering I had in mind when I created the free license.
Tortog wrote:
I also have a module that I wrote when 2.0e was the game of choice and TSR was still king. It is set in the city of Velmaria which is concealed within a pocket dimension. The city of Velmaria is ruled by a society of wizards and for centuries uncounted has existed in a symbiotic peace with the outside world, but some evil wizards are trying to change this by taking Velmaria to war. The players must decipher the secrets of a dangerous tower and then use the info there to avert disaster. It is written for 8-10th level 2e characters.
That also sounds like it might be a fun 3PP product. Obviously you should probably update the rules system.
