{
  "additional_wants": {
    "id": "minecraft:book"
  },
  "double_trade_price_enchantments": "#minecraft:double_trade_price",
  "given_item_modifier": [
    {
      "type": "minecraft:enchant_randomly",
      "include_additional_cost_component": true,
      "only_compatible": false,
      "options": "#minecraft:tradeable"
    },
    {
      "type": "minecraft:filtered",
      "item_filter": {
        "items": "minecraft:enchanted_book",
        "predicates": {
          "minecraft:stored_enchantments": [
            {}
          ]
        }
      },
      "on_fail": {
        "type": "minecraft:discard"
      }
    }
  ],
  "gives": {
    "id": "minecraft:enchanted_book"
  },
  "max_uses": 12,
  "reputation_discount": 0.2,
  "wants": {
    "count": 0,
    "id": "minecraft:emerald"
  }
}