How many Twilight books have been written?
6
5
5
5
5
5
4
5
4
5
4
5
4
5
4
5
4
5
4
5
4
3
5
2
4
3
5
2
4
3
7
5
2
6
4
3
7
5
2
6
4
3
7
5
2
6
4
3
7
5
2
6
4
3
7
5
2
6
4
3
7
5
2
6
4
3
7
2
6
4
3
7
2
6
4
3
7
2
6
4
3
7
1
2
6
4
3
7
1
2
6
3
7
1
2
6
3
7
1
8
2
6
3
7
1
8
2
6
3
7
1
8
2
6
3
7
1
8
2
6
3
7
1
8
2
6
3
7
1
8
2
6
7
1
8
6
7
1
8
6
1
8
1
8
1
9
8
14
1
9
10
8
14
1
12
9
10
8
14
1
12
9
10
8
14
1
12
9
10
8
14
1
12
9
10
8
14
1
12
9
10
8
14
11
12
9
10
8
14
11
13
12
9
10
8
14
11
13
12
9
10