How many books are in the Percy Jackson series?
5
7
7
7
7
7
6
7
6
7
5
6
7
5
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
7
5
4
6
8
7
5
4
6
8
7
5
4
3
6
8
7
5
4
3
6
8
5
4
3
6
8
5
4
3
6
8
5
4
3
6
8
5
4
3
6
8
5
4
3
12
8
14
5
4
3
12
8
14
4
3
12
11
8
14
4
3
12
11
1
8
14
3
12
10
11
1
8
14
3
12
10
11
1
8
14
3
12
10
ten
11
9
1
8
14
3
12
10
11
9
1
ten
8
14
13
3
12
10
11
9
1
8
14
13
3
12
10
11
20
9
1
0
2
8
14
13
3
12
10
24
11
20
9
1
2
8
148
14
13
17
0
3
12
10
24
11
20
9
1
2
8
14
108
13
17
3
148
58
121