List all books

{
    "books": [
        {
            "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
            "slug": "the-great-controversy",
            "titleEn": "The Great Controversy",
            "sortOrder": 1,
            "isActive": 1,
            "translationCount": 5,
            "fileCount": 8,
            "totalDownloads": 1250
        },
        {
            "id": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
            "slug": "steps-to-christ",
            "titleEn": "Steps to Christ",
            "sortOrder": 2,
            "isActive": 1,
            "translationCount": 3,
            "fileCount": 4,
            "totalDownloads": 890
        }
    ]
}