I got the small rectangular one "The Vegetarian Slow Cooker", but now that I see there are others I will probably have to get those too.

I skimmed through the one I got and it does seem like there is some prep work involved - not just throw and go.
From the looks of the reviews I would probably go with the one that is $10.?? "The Healthy and Hearty..." It has better reviews and everyone who got it seems satisfied. I have a gift card too to Borders/Amazon so I think I may be doing a little shopping later too.
I've been wanting a veggie slow cooker books for years and I had given up until I saw the one I got on half, but like I said I think I would get the other one instead just by the reviews. And you should be able to get that one with shipping with your card and have no out of pocket expense.
Hope that helps!
~Becky