How many books are there in Twilight series?
6
5
5
5
5
5
5
5
3
5
4
3
5
4
7
3
6
5
4
7
3
6
5
4
7
3
6
5
4
7
3
6
5
4
7
3
6
5
8
4
7
3
6
5
8
4
7
2
3
6
5
8
4
7
2
3
6
5
8
4
7
9
2
3
6
5
13
8
4
7
9
2
3
6
5
13
8
4
7
9
2
3
6
5
13
8
4
7
9
2
3
6
13
8
4
7
9
2
3
6
12
1
13
8
4
7
9
2
3
6
12
1
13
8
4
7
9
2
3
6
12
1
13
10
11
8
4
7
9
2
3
6
12
1
13
10
11
8
4
7
9
2
3
6
12
1
13
10
11
8
4
7
9
2
3
6
12
1
13
10
11
8
4
7
9
2
6
12
1
13
10
11
8
7
9
2
6
12
1
13
10
11
8
9
2
12
1
13
10
11
8
9
2
12
1
13
10
11
8
9
2