pumpkin-java-multiversion/assets/datapacks/26_3/data/minecraft/recipe/book_cloning.json

{
  "type": "minecraft:crafting_special_bookcloning",
  "material": "#minecraft:book_cloning_target",
  "result": {
    "id": "minecraft:written_book"
  },
  "source": "minecraft:written_book"
}