Y'know, those are all great questions lol. I'm actually wondering many of the same things as this'll be my first FCBD too!
I think it's only one free book out of the listed titles, but idk other than that. I also wonder if, say I want both the titles I listed, can I buy one and one is the free one, or is it like a one per customer kind of thing?
Hopefully one of us 'round here who knows can comment with the answers, otherwise I plan to ask these questions to my shop since I'll be there Wednesday anyway and I'll come back and let ya know!