A mixture of Dungeons and Dragons and the old andventure novels were you made the characters' decisions for them. I recommend this for pre-teens interested in the science fiction/fantasy genres.
Along the lines of the "choose your own adventure" series. A fair knock off. Read a bit, pick a thing to do, move to the directed page, and do it again until you either die, or win the adventure. (I always jumped around to read every possible way so as not to miss out on what could happen.)
