XG Perfect Works is Japanese, but fan translations have been done of it and most are available on the net. Perfect Works were essentially super-strategy-guides that Square put out during the PS1 era for many of their games (I know for sure that Xenogears, Legend of Mana, and Vagrant Story all got one), which contained inside information on the games' workings, the behind-the-scenes decisions, developer commentary, etc. Sort of like a specialized formatted design document and secrets guide all in one. It was more or less insisted upon by the scenario writer that the Xenogears Perfect Works guide include all of the cut information from the game that tied the game to the overarching then-prototype Xenosaga storyline.
Sky Render - Sanity is for the weak.
