How many books did Jack London have published?
50
3
3
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
5
4
2
7
6
1
3
5
4
2
7
6
1
3
0
5
4
2
7
6
1
3
5
4
0
2
7
6
1
3
5
8
4
2
7
6
1
0
3
5
8
4
2
7
6
1
3
0
5
8
4
2
7
6
1
9
3
5
8
4
0
2
7
6
1
9
3
5
8
4
2
7
6
1
0
9
3
5
8
4
2
11
7
6
1
9
3
10
0
5
8
4
2
11
7
6
1
9
10
5
8
4
13
0
2
11
7
12
6
1
16
9
10
5
8
13
11
7
12
6
1
0
16
9
10
8
13
11
14
7
12
6
1
16
9
66
10
0
8
13
11
14
7
12
102
6
1
16
123
9
10
132
66
8
13
0
11
7
1
17
62
144
102
123