I think it just comes with the book. There's another special edition which is bundled with Divine Divinity.

The summoning dolls are like temporary characters. There are four in the game and they can be summoned for a while when required. They need time to recharge, though. Like characters, they can be given equipment and you can give them your skill points (from the Hero or DeathKnight). I'm not sure how death affects them.

Short demos do suck... <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" /> Oh well, I'll just have to consider Divine Divinity as my demo! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />