How many books are in C.S. Lewis' Space Trilogy?
3
3
3
3
3
3
3
3
3
3
3
2
3
2
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
1
2
4
3
1
2
4
3
1
2
4
1
2
4
1
2
4
1
2
4
1
2
4
5
1
2
4
5
1
2
4
5
1
2
6
4
5
1
2
6
4
5
1
2
6
4
5
1
6
4
5
1
6
4
5
0
1
6
5
1 & 2
a total of three
1
a total of 3
6
5
0
a total of four
1
a total of 6
1 & 2
6
5
a total of 5
0
a total of 4
a total of three
1
a total of 3
6
5
a total of four
0
a single book
1
a total of 6
1 & 2
6
a total of five
5
a total of six
a total of 5
1 & 3
a total of 4
a total of three
1
a total of 3
6
5
0
a total of four
a single book
a single volume
1 & 2
a total of seven
a total of 6
6
a total of five
5
a total of 7
a total of six
a total of 5
0
a total of 4
a total of three
7
a total of 3
6
a single book
5
a single volume
1 & 2
1 & 3
a total of four
1 - 3
7
a total of seven
0
a total of 6
6
a total of five
5
a total of 7
a total of six
a total of 5
a total of 4
a total of three
a single trilogy
a single book
7
a single volume
1 & 2
a total of 3
6
5
0
a total of four
1 x 3
1 & 3
7
a total of seven
a total of 6
6
a total of five
5
1 - 3
a single trilogy
a total of 10
a single book
a total of six
a total of 5
a single volume
1 & 2
0
a total of 4
a total of three
7
a total of 3
6