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

{
  "type": "minecraft:crafting_shapeless",
  "ingredients": [
    "minecraft:book",
    "minecraft:ink_sac",
    "minecraft:feather"
  ],
  "result": {
    "id": "minecraft:writable_book"
  }
}