A lot of the items aren't going to be in a manual, if there is one in the first place, as you are supposed to discover them as you play through the game. I know it's a bit frustrating but it makes sense for this game as you mostly find the new items via crafting and the like :) Also, it gives you more incentive to try and discover things, at least that's how I feel about it, your mileage may vary, of course :)