How many books are in the Earth's Children?
6
3
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
2
3
4
5
2
3
4
7
5
6
2
3
4
7
5
6
2
3
4
7
5
6
2
3
4
7
5
6
2
3
4
7
5
1
6
2
3
4
7
5
1
6
2
3
4
7
5
1
6
2
3
8
4
7
5
1
6
2
3
8
4
7
5
1
6
2
3
8
4
7
5
1
6
2
3
8
4
7
5
1
6
2
3
8
4
7
5
9
1
6
2
10
8
4
7
9
1
12
6
11
2
10
8
7
9
1
12
6
13
11
2
10
8
7
0
9
1
12
6
13
11
2
10
8
7
9
1
12
6
13
11
0
2
10
8
7
9
1
12
6
13
11
2
10
8
0
7
9
1
12
6
13
11
2
10
8
7
14
9
1
12
6
13
11
16
10
8
7
14
9
1
12
6
66
66
132
102
114
66
116