They weren't in my planned timeline.
I've been running for this group for about 8 months now(they all
started at level 1), and things got wacky(people played scenarios I planned on running for the group) and I needed something
to fill the gap to a few more scenarios, then Ruby Phoenix before high level play. I happened to have CC book 3 and 4 prepped
already from when I ran the campaign several years back before it
was PFS sanctioned, though I never ran part 4 because I TPK'd the
party in book 3. Oops, that may not be conductive to making
people want to play!