I finished this game pretty quickly after it came out so I haven't played it in forever. My friend and I decided to play it yesterday so she could finish it. We both had to dl an update and started playing on her game save. We are as far as building the Keep in the forest world and now he is telling us to go find the princess. We are missing the piece of the archway to get to the Desert Kingdom which I know is where she is. We have done everything we can in the Ice Kingdom and the Forest Kingdom, as far as I know. We built the University but we need 2 books to activate it and we have harvested everything there and can't find the books. I can't remember where we get the books anyways. Basically we are stuck and I don't know if the game is glitched or we are missing something. Where do we get the piece we need to unlock the Desert Kingdom?