To figure out the code for the first book, read the part toward the beginning that shows the symbols from the Book, then read the translation. And wouldn't it be interesting if Artemis found out about the fairies again by reading the Artemis Fowl books? That's a stupid idea, but it would be interesting. Or maybe his mom will come into play? With all the stuff going on, she's bound to notice something. Or, to go with the obvious aproach, Mulch could just give him the disk. That wouldn't be any fun, though.