Artemis Fowl's Diary is Artemis's diary from The Eternity Code, which is encrypted. In the diary, Artemis talks about his misadventures in his life and also about his father, after his return from captivity. The diary features Artemis's conversations with his father and his father's wisdom. Artemis Senior no longer cares about doing illegal things and just wants to be Artemis's hero, as mentioned in Artemis's diary. Artemis thinks this may be due to Holly's magic which healed him, himself, or a mixture of both. Artemis's diary is featured many times in The Eternity Code.