How many books in the Harry Potter series did J. K. Rowling write?
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
5
5
5
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
8
2
6
5
8
2
4
6
5
8
2
4
6
5
8
2
4
6
5
8
2
4
6
5
3
8
2
4
6
5
3
8
2
4
6
5
3
8
2
4
6
3
8
2
4
6
3
8
2
4
6
3
8
2
4
6
3
8
2
4
3
8
1
2
4
3
8
1
2
9
4
3
8
10
1
2
9
4
3
8
10
1
2
9
4
3
11
8
10
1
2
9
17
4
3
11
8
10
1
2
9
17
4
14
3
11
8
10
7 books
1
2
9
17
4
14
3
11
8
10
1
2
9
17
4
14
3
11
10
7 books
1
9
17
4
14
3
11
10
1
9
17
14
3
11
10
7 books
1
9
17
14
3
11
10
1
9
7 books
17
14
3