Keep playing with it. Someone else I know had a hard time getting it to work too. Try adding something in your cart (another item) then add the code. I think that’s how it originally worked for me, could have been coincidence though. Then I took the other item out. But yes, it is kind of glitchy.
Still no word on what books are included? I don’t like buying things sight unseen, especially books.
Yeah, what happened to the email they were supposed to send you guys?