Once I figured that out, I wrote the damn book. It was ready to launch this summer, but I hadn't finished book 6 yet, and I didn't dare risk another two-year gap between releases. Book 6 in stark contrast took me six months to write, which is pretty damn good for me. It's now off with the editors, so I'm feeling fairly comfortable with a January launch date.
Book 7, the final book in the series, is in the outlining phase. I've known how the series ends since Book 2. Now I just have to make sure the characters I've grown to love have a proper send-off. How long will it take me to write? No clue. Even with an outline, some days (or weeks, ugh) the words don't come. Being unable to predict how long it will take to write a book drives me insane. The inconsistency of ease from book to book is... GAH!
Still, there's nothing greater than finishing a story and sharing it with the world.