How many books have been written for the Twilight series?
5
5
5
5
5
5
5
4
5
4
5
4
5
7
4
5
7
6
2
4
5
7
6
2
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
3
4
5
7
6
2
8
3
4
7
6
2
8
3
4
7
1
6
2
8
3
4
7
1
6
2
8
3
4
7
1
6
2
8
3
4
7
1
6
2
8
3
4
7
1
6
2
8
3
14
7
1
0
6
2
8
3
14
7
12
10
1
6
2
8
3
14
12
10
1
6
2
8
3
14
12
10
9
1
8
3
14
12
10
9
1
8
3
14
12
11
10
9
1
8
14
17
12
11
10
9
1
8
14
17
12
109
11
10
9
1
8
14
17
12
11
10
9
1
8
ten
14
17
12
11
10
9
1
121
108