ALTER TABLE yourTableName auto_increment = anySpecificPoint;

mysql> create table AutoIncrementSpecificPoint
   −> (
   −> BookId int auto_increment not null,
   −> Primary key(BookId)
   −> );
Query OK, 0 rows affected (0.56 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.17 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.17 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.09 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.10 sec)

mysql> select *from AutoIncrementSpecificPoint;

+--------+
| BookId |
+--------+
|      1 |
|      2 |
|      3 |
|      4 |
+--------+
4 rows in set (0.00 sec)

mysql> alter table AutoIncrementSpecificPoint auto_increment = 100;
Query OK, 0 rows affected (0.25 sec)
Records: 0 Duplicates: 0 Warnings: 0

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.25 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.18 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.14 sec)

mysql> select *from AutoIncrementSpecificPoint;

+--------+
| BookId |
+--------+
|      1 |
|      2 |
|      3 |
|      4 |
|    100 |
|    101 |
|    102 |
+--------+
7 rows in set (0.00 sec)