{
  "variants": {
    "": [
      {
        "model": "minecraft:block/bookshelf"
      },
      {
        "model": "minecraft:block/bookshelf1"
      },
      {
        "model": "minecraft:block/bookshelf2"
      },
      {
        "model": "minecraft:block/bookshelf3"
      },
      {
        "model": "minecraft:block/bookshelf4"
      }
    ]
  }
}