How many books in the Harry Potter series did J. K. Rowling write?
7
3
3
3
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
2
3
4
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
7
5
2
3
4
1
7
6
5
2
3
4
1
7
6
5
2
3
4
1
7
6
5
2
3
4
1
7
6
5
2
3
4
1
7
6
5
2
4
1
7
6
5
2
4
1
7
6
5
2
4
1
7
6
5
2
1
7
6
2
1
7
6
2
8
1
7
6
2
8
1
7
6
2
8
1
7
6
8
9
1
11
7
6
8
9
11
7
6
10
8
9
11
7
6
10
8
9
11
7
6
10
8
9
11
7
6
10
8
9
11
7
6
10
8
9
11
6
12
10
8
9
11
12
13
10
8
9
11
12
13
10
8
9
11
12
13
10
8
9
11
12
4 books
3 books
5 books
4 books
2 books
3 books
4 books