What is the length of time in years the longest running book series has continued?
Simon and Schuster Crossword Puzzle Book
2
2
5
4
2
5
3
4
2
5
3
4
2
7
5
3
4
2
7
58
5
3
4
2
7
57
66
58
5
3
1
20 years
4
59
2
7
5
3
1
57
66
58
4
2
7
59
5
3
1
20 years
4
25
57
2
66
7
58
7 years
5
3
1
61
59
4
25
125
2
7
30 years
57
66
58
20
5
16
108
3
1
69
20 years
11
4
25
59
2
7
125
6
7 years
20
5
16
3
1
61
57
102
50
66
58
8
11
4
9
25
69
114
2
7
365
30 years
59
6
20
5
16
108
3
1
125
50
20 years
8
11
4
9
13
111
25
61
57
2
66
7
58
6
20
5
16
3
1
59
102
50
8
11
4
9
13
25
125
69
114
20 years
2
7
10
30
112
365
30 years
57
6
66
58
20
5
16
108
3
1
50
8
11
4
9
13
111
25
59
2
7
106
10
30
28
6
69
63
20
5
24
16
112
3
1
57
100
102
50