In the main pdf I see a sixth circle type of "Investigators", but in the circle sheets there are only five and that is the one missing.
And of course when I asked my players if they wanted to try one of these new circle types, that's the one they wanted!
Hey, thanks for messaging! The "Investigators" crew is just the default circle type from the core Candela Obscura book (page 41).
Due to how they've worded their Community Gaming License, I'm not able to create a circle sheet for them (but the one on the Candela Obscura Darrington Press site should work just fine for them).