How Did We Find Out is a 15-book series with 15 released primary works first released in 1973 with contributions by Isaac Asimov.
#8 of 15 in How Did We Find Out
1974 • 1 Reader • 64 pages • 5
#11 of 15 in How Did We Find Out
1976 • 64 pages
#21 of 15 in How Did We Find Out
1981 • 61 pages
#28 of 15 in How Did We Find Out
1985 • 64 pages
#30 of 15 in How Did We Find Out
1986 • 60 pages
#33 of 15 in How Did We Find Out
1988 • 64 pages