How many books are in the original Harry Potter series?
7
5
5
3
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
3
7
4
5
3
7
4
5
3
7
4
6
5
3
7
4
6
5
3
7
2
4
6
5
3
7
2
4
6
5
3
7
2
4
6
5
3
7
2
4
6
5
3
7
2
4
6
1
5
3
7
2
4
6
1
5
3
7
2
4
6
1
8
5
3
7
2
4
6
1
8
5
3
7
2
4
6
1
8
3
7
2
4
6
1
8
7
9
2
4
6
1
8
7
9
2
6
1
8
11
7
10
9
2
6
1
8
11
7
10
9
2
6
1
8
11
7
10
9
2
6
1
8
11
7
10
9
2
6
1
8
12
11
10
9
2
6
1
8
13
12
11
10
9
2
6
1
8
13
12
11
10
9
2
1
8
13
12
11
10
9
2
1
8
13
12
16
11
10
9
1
8
13
12
16
4 books
7 books
5 books
3 books
4 books
7 books