I've spent months coming up with background information and world-building. I have the characters. I have the plot. But I need a structure. What I am planning to write is a complex epic fantasy series covering the lives of five different main characters over a span of about two dozen years from the starting date of the series to its conclusion. I have no idea how I should gather all of these stories together. My original thought was a set of five separate series, with three books each. Northwind Book 1: Character A is the main character, but character B is important. Character C is character B's sister but of little relevance. Book 2: Character A is the main character, but the book is about character B. Character C becomes an antagonist. Book 3: Character A is the main character, and the book is about him. Characters B is in the background, character C is not present. Southwind All about character C, takes place at the same time as Book 3 of Northwind Eastwind All about character D, who has no connection to characters A, B, or C. Westwind All about character E, who has no connection to any characters. 5th Series (No name as of yet) Characters B, C, D, and E all rule empires and all believe they are destined by a prophecy to rule the human world. Character A is a king, but the other characters dismiss him as unimportant until he interferes by turning on his longtime friend, character B, and proves them severely wrong. ---- That was the original structure, but I've grown to doubt that it is the best way to relate all of these characters' stories at the same time. The pacing would also be somewhat uneven. Does it even make sense to divide stories about the same world and time period into different series? The alternate idea was to condense each series into a single very long book, around 1,000 pages each. I could then merge books 1 and 2 of Northwind and potentially switch the main character perspective to character B since it is about him anyways. Maybe I could make both characters A and B the main characters. Then I could expand Book 3 of Northwind and publish it separate, as Sea Wind. Granted, that disrupts the flow of direction based names. South, East, and West could remain as they are, just turned into books instead of series. ---- The problem I see with both of these approaches is that each very lengthy series/book focuses on a different character, so by the point of the 5th series/book readers might have all but forgotten about characters A and B. I'm not even sure that readers would like to read a series where each book switches to a new character's perspective. That leaves the option of writing them all into the story at once, with every book focusing on each character's story at once, like A Song of Ice and Fire/Game of Thrones. But I feel like it would be difficult for me to tell all of these stories simultaneously and if I did go down this road, it would quickly start to resemble a Game of Thrones rip-off (which my story is not), just because of the way the plot is structured. I'm really hoping that you guys with more experience may have some insights that will help me choose the structure for the story.