[
    {
        "kind": "", 
        "full_sort_key": "$child$2", 
        "cover_color": "#000000", 
        "author": "", 
        "url": "http://testserver/katalog/lektura/child/",
        "has_audio": false, 
        "title": "Child", 
        "cover": "",
        "liked": null,
        "epoch": "", 
        "href": "http://testserver/api/books/child/",
        "key": "book$child", 
        "genre": "Wiersz", 
        "simple_thumb": "", 
        "slug": "child", 
        "cover_thumb": ""
    }, 
    {
        "kind": "", 
        "full_sort_key": "$grandchild$3", 
        "cover_color": "#000000", 
        "author": "", 
        "url": "http://testserver/katalog/lektura/grandchild/",
        "has_audio": false, 
        "title": "Grandchild", 
        "cover": "",
        "liked": null,
        "epoch": "", 
        "href": "http://testserver/api/books/grandchild/",
        "key": "book$grandchild", 
        "genre": "Sonet", 
        "simple_thumb": "", 
        "slug": "grandchild", 
        "cover_thumb": ""
    }, 
    {
        "kind": "Liryka", 
        "full_sort_key": "john doe$parent$1", 
        "cover_color": "#a6820a", 
        "author": "John Doe", 
        "url": "http://testserver/katalog/lektura/parent/",
        "has_audio": true, 
        "title": "Parent", 
        "cover": "cover/parent.jpg",
        "liked": null,
        "epoch": "Barok", 
        "href": "http://testserver/api/books/parent/",
        "key": "book$parent", 
        "genre": "Sonet", 
        "simple_thumb": "http://testserver/media/cover_api_thumb/parent.jpg",
        "slug": "parent", 
        "cover_thumb": "cover_thumb/parent.jpg"
    }
]