"Because you just read a Codex Book."
Aiwass laughed and said, "That's why you think a Codex Book is something good... Although it certainly is, I'm not particularly in need of Mystical Skills now."
Afterward, Miss Maya planned to give him a Codex Book of the Path of Devotion—though it was said to be a gift, it was actually more like a loan for him to take a look. After all, one could learn by reading it once, and it was someone's treasured and beloved book. When the time came, Aiwass would certainly need to politely return it.
He didn't know what his grandfather had hidden, but it was likely another book related to skills. Perhaps, it was also of the codex level.
A Codex Book is the highest-level book in the study of the occult. Its knowledge is 'alive'.