yes....the manual breaks things down really well (at least I thought it did). I played the other two, but never went so far as most of the ppl on the shrapnel forums. I understand what is going on, but that is pretty much it.
What things are you having difficulty with? I can try to help you out. I am not sure what is in the demo, as I did not play the demo.
The manual is, like I said, 300 pages. There are formulas that explain combat, magic and why things happen the way they do. I enjoy reading that stuff, but I don't think of that stuff really when I am playing. The manual also lists each nation (and each nation by age), what fortresses the nation uses, and gives a sample basic strategy. These strategies are really just a start, as in Dominions, there are so many counters. After the nations, there is a strategy overview section. Oh, forgot to mention....in the manual, there are "strategy thoughts" after the big stuff. Like Pretender creation...the manual gives thoughts about what you should be trying to do with Pretender creation. A big section on units....magic....dominion....good info to know. The strategy overview section is interesting to read, as it puts things into perspective.
Also, the manaul really breaks spells down.....MUCH better than the Dom2 manual. I really like the way it lists the spells. Summons are broken down by nation. Just, an awesome manual....reminds me sorta of the Civ 2 manual/strategy guide that I had years ago.
Like I said, though....what questions do you have? I am not a great player....and in fact, I probably, and most likely, really suck....I am not a min/maxer, I just play to have fun. But I will help out as much as possible.
The game does have incredible depth, but the interface is really rough, and still pretty rough in Dom3. But, for some reason, I was able to click with the interface.
Chris