I ordered what I thought was going to be just a tribute concert poster, but it's actually a book filled with pictures and quotes. It's pretty neat! There is no author, but it was published in 1993 by International Music Publications Limited, and all profits go to AIDS charities. But I bought it used, so in my case, profits go to the previous owner.
It does make me sad, though, that the entire concert isn't available to the public for some reason. The pictures are pretty fantastic, and it seems unfair for Queen Productions Ltd to not give full credit or acknowledgment where it is due.