How many Dune novels did Frank Herbert write?
6
3
3
2
3
2
3
1
2
3
1
4
2
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
6
2
0
5
3
1
4
6
2
7
5
3
1
4
6
2
7
5
3
1
4
6
2
7
5
3
1
4
6
2
7
5
1
4
6
2
7
5
1
4
6
7
5
1
4
6
8
7
5
4
6
8
7
5
6
8
7
5
6
8
9
7
10
6
8
9
7
10
6
8
9
7
11
10
6
8
9
7
11
10
13
6
8
9
7
11
10
13
6
8
9
12
7
11
10
13
6
8
9
12
7
11
10
13
6
8
9
12
7
11
10
13
6
8
9
12
7
11
10
13
6
8
9
12
7
11
10
66
102
62
132
76
77
05