Distribution to iBooks is handled via Smashwords, and since we’ve got a conflict going on right now Smashwords had no choice but to temporarily archive the book mid-October. Books 2 & 3 aren’t involved, which is how they’re still up. Still waiting to hear back from the 3rd party so we can get book 1 up again. In the meantime, @ais-n offered to host the file in a couple different formats over on her site:
Thanks for your patience <3