{
  "variants":
  {
    "":
    [
      { "model": "minecraft:block/bookshelf", "weight": 3 },
      { "model": "minecraft:block/bookshelf_alt_1", "weight": 3 },
      { "model": "minecraft:block/bookshelf_alt_2", "weight": 3 },
      { "model": "minecraft:block/bookshelf_alt_3" },
      { "model": "minecraft:block/bookshelf_alt_4" }
    ]
  }
}