hey peeps bought a paleo dessert book

Paleo Dessserts | Cookbook

and a lot of the ingredients says to use "just like sugar table top natural chicory root sweetener" but its rather hard to find so i was thinking maybe to use "Stevia" I haven't herd of it before and read a quick post by Mark about it. So anyway i was in Tesco earlier and i see it in there but wasn't to sure due to the ingredients (Maltodextrin,Sweetener: Steviol Glycosides ,Natural Flavourings)

Canderel Green Stevia Sweetener 75G - Groceries - Tesco Groceries

here is a link to the Tesco site with the picture i really haven't got much of a clue about this only what i read from Mark

Any help would be great
Paul (UK)