tomes_bookshelf.json

{
  "variants": {
    "facing=south": { "model": "inspirations:block/bookshelf/tomes" },
    "facing=west":  { "model": "inspirations:block/bookshelf/tomes", "y":  90 },
    "facing=north": { "model": "inspirations:block/bookshelf/tomes", "y": 180 },
    "facing=east":  { "model": "inspirations:block/bookshelf/tomes", "y": 270 }
  }
}