"Is there a place to read some mini-comics online for free to preview the game?"
I'm not sure what you are getting at with that at all... but I'm sure you can find some one page comics around... but not the full stories of the longer ones.
Check Jake's site. (I don't know if he has put them up yet, he seems very slow with anything)
And if all else... I know you might have an easier time just getting one of the four individual issues from somewhere online rather than the collection of these four.