How many authors wrote books in the Wheel of Time series?
2
4
2
1
4
2
1
4
2
1
4
2
3
1
5
4
2
3
1
5
4
2
3
1
5
4
2
3
1
5
4
2
3
1
5
4
2
3
6
1
5
4
2
3
6
1
5
4
2
3
6
1
5
4
2
3
6
1
5
4
2
3
6
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
4
2
3
6
7
1
8
5
3
6
7
8
5
3
6
7
8
5
3
14
6
7
8
9
5
14
6
7
8
9
14
6
7
8
9
14
6
7
11
8
9
14
6
10
7
11
8
9
14
6
12
10
7
11
13
8
9
14
12
10
7
11
13
8
9
14
12
10
7
11
13
8
9
14
12
10
7
11
13
8
9
14
12
10
7
4 authors
3 authors