- This card has four counterparts: "Book of Taiyou", "Book of Life", "Book of Eclipse" & "Book of Lunar Eclipse"
- This card has the exact opposite effect of "Book of Taiyou" ("taiyou" being Japanese for "sun", so "Book of Sun").
- This card is the much more improved version of "Darkness Approaches".
- This card is a more liberal version of the anime-only "Book of Flip".
- The German print of this card in Legendary Collection 3: Yugi's World Mega Pack accidentally has the effect of "Creature Swap" printed on it.