Problem with count the records in sql server

;with mycte as
(select (select sum(b.ES_COST) from ES_LIBRARY_BOOKS b
inner join ES_DEPARTMENTS d on d.ES_ID=b.ES_DEPT_ID
left join ES_BRANCHES on  ES_BRANCHES.Es_Id=b.ES_BRANCH where b.ES_BRANCH=1
and ES_BRANCHES.ES_INSTITUTE_ID= 1 ) as Total,
b.ES_ID,b.ES_TITLE,b.ES_BOOK_TYPE,b.ES_BOOK_REMARKS,b.ES_DEPT_ID, row_number() over(partition by b.es_title, b.ES_AUTHOR,b.ES_EDITION order by b.es_title) rn,
b.ES_CLASS_DETAIL_ID,b.ES_ENTERED_BY,b.ES_SPECIALIZATION,b.ES_SUBJECT as SUBJECT,
b.ES_ENTRY_DATE,b.ES_YEAR,d.ES_DEPT_NAME,b.ES_EDITION,b.ES_AUTHOR,b.ES_PUBLISHER,b.ES_COST,b.ES_VOLUME,b.ES_PAGES,b.ES_SOURCE,b.ES_BILL_NO,b.ES_BILL_DATE ,b.ES_BAR_CODE,b.ES_BRANCH,b.ES_CALL_NO from ES_LIBRARY_BOOKS b
inner join ES_DEPARTMENTS d on d.ES_ID=b.ES_DEPT_ID
left join ES_BRANCHES on  ES_BRANCHES.Es_Id=b.ES_BRANCH where b.ES_BRANCH=1
and ES_BRANCHES.ES_INSTITUTE_ID= 1 )
SELECT CASE WHEN rn > 1 THEN '' ELSE  ES_AUTHOR  END AS  ES_AUTHOR,es_title,

       CASE WHEN rn > 1 THEN '' ELSE  ES_EDITION END AS  ES_EDITION,
       case when rn> 1 then  '' else  ES_PAGES  end  as es_pages

FROM   mycte