Get a book

curl --request GET \
  --url https://api.slant.app/v1/books/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "abc123xyz",
  "name": "John's Book",
  "role": "principal",
  "users": [
    {
      "id": "abc123xyz",
      "email": "user@example.com",
      "first_name": "John",
      "last_name": "Doe",
      "role": "contributor"
    }
  ],
  "tiers": [
    {
      "value": 1,
      "label": "A-tier"
    }
  ],
  "teams": [
    {
      "id": "<string>",
      "name": "Advisory Team"
    }
  ]
}