SQL & PL/SQL :: How To Find The Latest Date

SQL> select * from emp;

SINO BOOK UPDATION_
---------- ---------- ---------
1 UB 01-MAR-10
2 UB 12-MAR-10
3 SB 12-MAR-10
4 DB 12-MAR-10
4 MB 12-JUN-10
4 MB 31-JUL-10

6 rows selected.

SQL> SELECT sino, book, updation_date
2 FROM emp
3 WHERE updation_date IN (SELECT MAX (updation_date)
4 FROM emp
5 GROUP BY book);

SINO BOOK UPDATION_
---------- ---------- ---------
2 UB 12-MAR-10
3 SB 12-MAR-10
4 DB 12-MAR-10
4 MB 31-JUL-10

I would like to know, how to find out the latest date from above query without using group functions like max, min,order by and group by.