Ruth wrote about her writing method because I asked her too. It’s only fair that I do the same. I consider my writing method an in-betweener. Meaning I’m somewhere in-between a pantser style of writing and a planner.
The scariest moment is always just before you start.
~Stephen King
When I start to write I have to have more than a vague notion of where I’m headed, but you won’t see me planning the book to death either. I have a book that I bought years ago titled First Draft in 30 Days by Karen S. Wiesner. That book is my Writing Bible.
I start every story by asking myself a few questions. Who? Why? What? Where? When? How?
If I can answer these questions then I start to plan. Now my Writing Bible has 19 worksheets within it, I only use 7 of those. I find they’re very helpful when I’m writing a series. I’ve posted some of the sketches that I use from the book or at least the ones that I’ve modified for my use.
Summary Outline (I usually get the idea for the story first, so I start with a Summary of the story. I write down everything that comes to mind.)
My Research List (I hate stopping to research something when I’m on a roll, so I just keep a list of things I need to find out and where the information will go. While I did get the idea from the book, I don’t use her worksheet.)
Story Evolution Sketch (I can’t post this one because I use it as is. I have no modified worksheet for it. It is basically a worksheet that allows me to track cause and effect through the whole story.)
Formatted Outline or as I like to call it, The Cover Letter
After I fill these out to the best of my ability, I have a good idea where I’m going and I head out on my writing adventure. 
sounds like an interesting series
I hope you and others like it.