Redid paperback covers

Originally, I wanted the IRF symbol on the spine of the paperback books, but the first time I made an attempt it didn't work out so well. However, with a lot of tweaking and making the IRF symbol more precise, I think I did it. The true test will be when I get physical copies to see if the spine versions are clear and neat.

Oh, and it will be included on the Prologue Chronicles books too, as well as any other future books given they turn out well.