How Did You Plan a Long Running Series?

By the book hat you assigned me, three books were already written. I always knew that there would be a lot of stories that i could explore with i and i don't plan. So i find that my best ideas come once i'm actually writing the book. As long as i know the first two or three chapters, i can then get on a roll. And then the bite comes. Iways call it the bite, and i don’t want to put the pencil down. I want to be in my room every minute of the day, just getting this story down on paper.