respective book and chapter structure added.

[bookstack] / dev / api / requests / shelves-create.json

{
  "name": "My shelf",
  "description_html": "<p>This is <strong>my shelf</strong> with some books</p>",
  "books": [5,1,3],
  "tags": [
    {"name": "Category", "value": "Learning"}
  ]
}