How many books are in the Oz series by L. Frank Baum?
14
4
3
4
3
4
3
7
4
3
5
7
4
3
5
7
4
8
6
3
5
7
4
8
6
3
5
7
4
8
6
3
5
7
4
8
6
3
5
7
2
4
8
6
3
5
7
2
4
8
6
3
5
7
2
4
8
6
3
5
7
2
4
8
6
3
5
10
7
2
4
8
6
3
5
10
7
2
4
8
6
3
5
10
7
2
4
8
6
3
5
10
7
2
4
9
8
6
3
5
10
7
2
4
9
8
6
3
5
10
7
2
4
9
8
6
3
5
10
11
7
2
4
9
1
8
6
3
5
10
11
7
2
9
1
8
6
5
ten
10
11
7
0
2
9
1
8
6
5
10
11
7
ten
2
9
1
8
0
6
5
10
11
2
9
1
8
6
10
11
2
9
1
8
6
10
11
2
9
1
13
19
14
10
11
2
9
1
13
19
14
10
11
2
9
1
13
19
14
10
109
108