Another Contest, Oh Yay!

Okay, I’m canceling the last contest because it just seemed to confuse everybody. Honestly, I thought the crypto solve would be a lot easier than the airplane photo. Shows you what I know.
So, for free audio books of the entire Praxis trilogy, be the first to answer the following question:
“What common household implement is worn by Vashti’s followers?”
The answer is in one of my books. Not one of the books I’m giving away, either.
As for the last question, here’s how to solve the clue “confused...