How many books are in the Oz series by L. Frank Baum?
14
3
5
3
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
2
3
4
5
2
3
4
7
5
2
6
3
4
7
5
2
6
3
1
4
7
5
2
6
3
1
4
7
5
2
6
3
1
4
7
5
2
6
3
1
4
7
5
2
6
3
1
4
7
8
5
2
6
3
1
4
7
8
5
2
6
3
1
4
7
8
5
2
6
3
1
4
7
8
5
2
6
3
1
4
7
8
5
2
6
1
9
11
4
7
8
10
2
6
1
9
11
4
7
8
10
2
6
1
9
11
7
12
8
10
2
6
1
9
11
7
12
8
10
2
6
1
9
11
7
12
8
10
2
6
1
9
11
7
13
12
8
10
2
6
1
9
11
7
13
12
8
10
2
6
1
9
11
7
13
12
8
10
6
1
9
11
7
13
12
8
10
6
14
1
9
11
4 books
112
7 books
5 books
3 books
4 books