So, in my research into writing books and reading books something you notice, hear, or see a lot of is the plot, the monomyth, the climax all of that. What I'm interested today is not in THE plot, but rather how to install and use subplots effectively. I'm really a beginner when it comes to subplots in stories really. I actually only really came to the idea because I was playing one of my favorite games, soul nomad and the world eaters, and in the beginning they introduce this character, that character, this idea, that reference, which play out much later in the game. This is what lead me to want to include sub plots in my stories, though they did already exist they weren't as fleshed out and full as I was making the overarching plot of the story and I really couldn't find much on writing subplots. So, I'd like to pose a few questions and ideas and get your responses on them. What is a subplot other than a smaller story within a larger narrative? How many subplots are too many for say a three hundred page book or even just a two hundred page book? Do they follow the same structure of plots, IE can I distill the hero's journey or plot diagram into the subplots? If I install a subplot about a side character, how will I be able to make it important enough to draw away from the main story, and take away attention from the MC? If I plan to write a sequel, is it okay to leave subplots open ended or will this dissatisfy readers? Some stories start after the introduction of the crisis and the struggle, can this be true with subplots? When will I know that a subplot is over with and to move on? Can a suboplot not involve the MCs, IE, if I want a subplot to revolve around an event that happened well before the time of the MC's birth, but it directly affects the MC's journey?