Each issue of TF comics usually has 3 covers: A, B and RI. Q1. What's the difference between issue with cover A, B, and RI? Just cover or more than cover? Q2. Why does 'Cover RI' is not called as 'Cover C'? Is it different from A or B? Q3. Can I get all of those covers if I order 3 copies on Amazon and note "I want one copy with cover A, another with cover B, and other with cover RI"?