public categories = [
        {id: 6, name: "Horror"},
        {id: 8, name: "Biography"},
        {id: 5, name: "Drama"},
        {id: 7, name: "Comedy"},
        {id: 2, name: "Fiction"}
    ];

<ListPicker [items]="categories" textField="name" valueField="id"
       [(ngModel)]="book.category"></ListPicker>