- This card's Japanese name is a reference to a grimoire.
- This book appears in the artwork of "Spellbook Magician of Prophecy", which also has the effect of searching "Spellbook" cards.
- According to Master Guide 4, The "Spellbook of Secrets" is the index to both the "Spellbook Library of the Heliosphere" and the "Spellbook Library of the Crescent".