I have an upcoming planned series of psychological/mystery/fantasy novels wherein various "arcs" of the series take place in different eras in this world's history, with the audience often reading of a momentous historical event, the time leading up to the event and/or the aftermath the event, where, in novels taking place later than earlier installments of the series, the information regarding that event may have been corrupted, directly contradicting the knowledge the audience has about the world and the event, which acts as a means of foreshadowing and/or world building. Of course, the mystery elements I feel would work well with the magic system, the understanding of which will act as the primary mystery over this series' time span, while simultaneously perpetuating smaller conflicts and mysteries that drive the story and the world even further. The psychological elements are directly associated with the nature of the magic system, though that isn't important. I'm not quite sure how I could do this though. My questions are mainly: 1: How and why would one even go about corrupting knowledge of important events in history? What'd be the process and the point? 2: How could I present these contradictions between what the world's inhabitants believe and what the audience knows without being too blatant about it so that the audience doesn't think that I, as the author, merely mixed up information concerning my own world? 3: How could a large mystery be perpetuated between various generations of people, and protagonists who ultimately have nothing to do with one another besides a potentially shared bloodline? 4: Is there a need to have much interconnecting the different generations and time periods besides taking place in the same world? 4.5: How could I have a boldly plot-important means of interconnecting the narratives of the "arcs" taking place in different time periods if I decide to or if there is a need to?