How many books about Tiffany Aching are in the Discworld series?
5
3
4
3
4
5
2
3
4
5
2
3
4
5
2
3
4
5
2
3
4
5
2
3
1
4
5
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
7
4
5
6
2
3
1
8
7
4
5
6
2
3
1
8
7
4
5
6
2
0
3
1
8
7
4
5
6
2
1
8
7
5
6
2
1
8
7
6
1
8
7
9
6
1
8
7
9
6
1
8
7
9
6
10
1
8
7
9
6
10
11
8
7
9
6
10
11
8
9
10
11
8
9
10
11
8
9
13
10
11
8
9
13
10
11
8
9
13
10
11
8
9
13
10
11
8
9
13
10
11
8
9
13
10
12
ten