Eclipse Phase is published by Posthuman Studios under the Creative Commons license. They can all be found for free at this blog. Read however much you like, I will try not to publish any published fluff outside of “Game Mechanics” chapters. However, anything intended for GMs (the nature of the TITANs, the exsurgents, anything in a Game Mechanics section) will be frequently and willfully used, altered, and/or abandoned. As a conspiracy horror RPG, expect allies to be working at cross-purposes, and for big bads to have alien motives.