How many books are in the Earth's Children?
6
5
5
5
4
5
4
5
6
4
3
5
6
4
3
5
6
4
3
5
6
4
3
5
6
4
3
7
5
6
4
3
7
5
6
4
3
7
5
6
4
3
7
5
6
4
3
7
5
6
4
3
7
5
6
4
3
7
5
6
4
8
3
7
5
6
4
8
3
7
5
6
4
8
3
7
5
6
4
8
3
7
5
6
4
8
3
2
7
6
4
8
3
2
7
6
4
8
3
2
7
1
6
8
3
2
7
1
6
8
3
2
7
1
8
9
2
7
1
8
9
2
7
1
8
9
2
7
1
8
9
2
7
1
10
8
9
2
0
1
10
8
9
2
1
10
0
8
9
2
1
10
8
9
2
0
11
1
10
ten
8
9
2
11
1
10
8
9
2
ten
11
1
14
10
8
9
2
11
ten
12
1
14
10
13
9
2
11
12
1
14
10
13
9
2
11
12
1
14
10
13
96