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