I do have to say … writing three interconnected novels all at the same time is rather fun. In the later novels you get an inspiration that affects the other books, and since you haven’t published them yet, you can go in and make the appropriate changes … leaving all sorts of fun clues and foreshadowing that readers will scratch their heads at until they read the next book … and get that wonderful “Aha!” moment.
I also have to say that doing it without using something like Scrivener would have been rather difficult. Not impossible, but not as easy. You’d have to resort to the old fashion method of an entire wall of your abode used as a giant post-it note gallery, with yarn and pushpins to tie the various points together.
Come to think of it, that sounds like fun too.
I doubt my landlord would appreciate 10,000 push-pin holes in one of the main walls of my apartment, though.