[
{
writer_id:1,
writer_name:'Ben'
book_id:1
book_name:'The special book'
},
{
writer_id:1,
writer_name:'Ben'
book_id:2
book_name:'My second book'
}
]

[{
    writer_id:1,
    writer_name:'Ben'
    books:
   [{book_id:1
    book_name:'The special book'
    },{book_id:2
    book_name:'My second book'
    }]

    }]