Your search for "Spellbook of Knowledge SDCH-EN023" revealed the following:
Spellbook of Knowledge - SDCH-EN023 - Common - 1st Edition from Structure Deck: Spirit Charmers 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:Send to the GY either 1 Spellcaster monster you control, or 1 other "Spellbook" card...
Spellbook of Knowledge - CH02-EN033 - Ultra Rare - 1st Edition from THE CHRONICLES DECK: Spirit Charmers (All-Foil Edition) 1st Edition, available at 401 Games Canada. Rarity: Ultra Rare Card Text:Send to the GY either 1 Spellcaster monster you control,...
Spellbook of Knowledge - INCH-EN059 - Super Rare - 1st Edition from The Infinity Chasers 1st Edition, available at 401 Games Canada. Rarity: Super Rare Card Text:Send to the GY either 1 Spellcaster monster you control, or 1 other "Spellbook"...