Repeated value of position - GridView

Question

I am working on an Android Application , here I need to display data in the GridView , The problem I am facing now is that value of position variable is repeating inside the getView(int position, View convertView, ViewGroup parent) method of the subclass of BaseAdapter . I tried to find out the issue after removing additional code from the subclass , still result is the same . I visited similar posts on stackoverflow but no luck .

Here is the code of LazyAdapter (subclass of BaseAdapter)

    public class LazyAdapter extends BaseAdapter {
            private Context ctx;
            private List<ItemDetails> items;
            BooksViewHolder booksViewHolder = null ;

            public LazyAdapter(Context context, List<ItemDetails> arrayList) {
                super();
                ctx = context;
                this.items = arrayList;
            }

            public int getCount() {
                return items.size();
            }

            public Object getItem(int position) {
                return items.get(position);
            }

            public long getItemId(int position) {
                return items.indexOf(getItem(position));
            }

            class BooksViewHolder{
                RelativeLayout containerLayout , playout , prelayout , offlinetext , thumblayout ;
                TextView text , priceText;
                ImageView image ;
            }

            public View getView(int position, View convertView, ViewGroup parent) {
                LayoutInflater inflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                if(convertView==null) {
                    booksViewHolder = new BooksViewHolder();
                    booksViewHolder.prelayout = (RelativeLayout) convertView.findViewById(R.id.prelayout);
                    convertView = inflater.inflate(R.layout.bookcontent, null);
                    booksViewHolder.text = (TextView) convertView.findViewById(R.id.bookname);
                    booksViewHolder.priceText = (TextView) convertView.findViewById(R.id.pricetext);
                    convertView.setTag(booksViewHolder);
                } else {
                    booksViewHolder = (BooksViewHolder) convertView.getTag();
                }

            prelayout.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                bookClickListener.onBookClick(position);
            }});

                return convertView;
            }

            interface OnBookClickListener{
                void onBookClick(int bookPosition);
            }

            public void setOnBookClickListenre(OnBookClickListener clickListener){
                bookClickListener = clickListener ;
            }

        }

MyActivity.java :

public class MyActivity extends Activity implements LazyAdapter.OnBookListener{

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.info);
        //Code to get the reference of Gridview .
        // set the listener on Gridview 
    }

  @Override
    public void onBookClick(int position){
    BookModel book= lazyadapter.getItems().get(position);

   //Here due to incorrect position I am not able to get particular book .
}

}

Help me please , I am not able to figure out the issue .