Die drei Fragezeichen (Original) is a 46-book series with 46 primary works first released in 1964 with contributions by Robert Arthur, William Arden, Investigators Three, Nick West, M.V. Carey, Marc Brandel, Megan Stine, Henry William Stine, and Peter Lerangis.
#1 of 42 in Alfred Hitchcock and The Three Investigators
1964 • 16 Readers • 165 pages • 3.6
#3 of 42 in Alfred Hitchcock and The Three Investigators
1965 • 7 Readers • 180 pages • 3.3
#7 of 42 in Alfred Hitchcock and The Three Investigators
1967 • 2 Readers • 164 pages • 3
#9 of 42 in Alfred Hitchcock and The Three Investigators
1968 • 2 Readers • 184 pages • 3
#11 of 42 in Alfred Hitchcock and The Three Investigators
1969 • 3 Readers • 176 pages • 3
#12 of 42 in Alfred Hitchcock and The Three Investigators
1969 • 4 Readers • 126 pages • 3
#13 of 42 in Alfred Hitchcock and The Three Investigators
1970 • 1 Reader • 127 pages • 3
#13 of 42 in Alfred Hitchcock and The Three Investigators
1970 • 1 Reader • 168 pages • 2
#13 of 42 in Alfred Hitchcock and The Three Investigators
1970 • 1 Reader • 111 pages
#13 of 42 in Alfred Hitchcock and The Three Investigators
1970 • 1 Reader • 157 pages • 4
#2 of 42 in Alfred Hitchcock and The Three Investigators
1964 • 1 Reader • 169 pages • 4
#14 of 42 in Alfred Hitchcock and The Three Investigators
1970 • 5 Readers • 167 pages • 3
#5 of 42 in Alfred Hitchcock and The Three Investigators
1966 • 2 Readers • 160 pages • 3
#6 of 42 in Alfred Hitchcock and The Three Investigators
1966 • 1 Reader • 158 pages • 3
#6 of 42 in Alfred Hitchcock and The Three Investigators
1966 • 1 Reader • 139 pages • 4
#6 of 3 in Alfred Hitchcock och Tre deckare
1966 • 1 Reader • 103 pages
#16 of 42 in Alfred Hitchcock and The Three Investigators
1971 • 2 Readers • 150 pages • 3
#10 of 42 in Alfred Hitchcock and The Three Investigators
1968 • 1 Reader • 176 pages • 4
#10 of 42 in Alfred Hitchcock and The Three Investigators
1968 • 1 Reader • 108 pages
#4 of 42 in Alfred Hitchcock and The Three Investigators
1965 • 2 Readers • 142 pages • 4.5
#17 of 42 in Alfred Hitchcock and The Three Investigators
1972 • 2 Readers • 159 pages • 3.5
#18 of 42 in Alfred Hitchcock and The Three Investigators
1972 • 2 Readers • 153 pages • 4
#20 of 42 in Alfred Hitchcock and The Three Investigators
1973 • 3 Readers • 172 pages • 3.3
#19 of 42 in Alfred Hitchcock and The Three Investigators
1973 • 2 Readers • 148 pages • 4
#21 of 42 in Alfred Hitchcock and The Three Investigators
1974 • 1 Reader • 139 pages • 4
#21 of 42 in Alfred Hitchcock and The Three Investigators
1974 • 1 Reader • 103 pages
#21 of 42 in Alfred Hitchcock and The Three Investigators
1974 • 1 Reader • 145 pages
#22 of 42 in Alfred Hitchcock and The Three Investigators
1974 • 2 Readers • 145 pages • 3
#23 of 42 in Alfred Hitchcock and The Three Investigators
1975 • 1 Reader • 113 pages
#23 of 42 in Alfred Hitchcock and The Three Investigators
1975 • 1 Reader • 151 pages • 4
#23 of 42 in Alfred Hitchcock and The Three Investigators
1975 • 1 Reader • 3
#15 of 42 in Alfred Hitchcock and The Three Investigators
1971 • 3 Readers • 175 pages • 3.7
#25 of 42 in Alfred Hitchcock and The Three Investigators
1976 • 2 Readers • 134 pages • 3
#24 of 42 in Alfred Hitchcock and The Three Investigators
1976 • 1 Reader • 148 pages • 4
#24 of 42 in Alfred Hitchcock and The Three Investigators
1976 • 1 Reader • 3
#26 of 42 in Alfred Hitchcock and The Three Investigators
1977 • 3 Readers • 151 pages • 3.5
#8 of 42 in Alfred Hitchcock and The Three Investigators
1967 • 4 Readers • 126 pages • 3
#27 of 42 in Alfred Hitchcock and The Three Investigators
1978 • 1 Reader • 108 pages
#27 of 42 in Alfred Hitchcock and The Three Investigators
1978 • 1 Reader • 144 pages • 4
#28 of 42 in Alfred Hitchcock and The Three Investigators
1978 • 1 Reader • 158 pages • 3
#28 of 42 in Alfred Hitchcock and The Three Investigators
1978 • 1 Reader • 152 pages • 4
#30 of 42 in Alfred Hitchcock and The Three Investigators
1979 • 2 Readers • 157 pages • 3
#31 of 42 in Alfred Hitchcock and The Three Investigators
1981 • 1 Reader
#29 of 42 in Alfred Hitchcock and The Three Investigators
1979 • 1 Reader • 151 pages • 4
#32 of 42 in Alfred Hitchcock and The Three Investigators
1981 • 1 Reader • 196 pages • 3
#32 of 42 in Alfred Hitchcock and The Three Investigators
1981 • 1 Reader • 158 pages
#32 of 42 in Alfred Hitchcock and The Three Investigators
1981 • 1 Reader • 111 pages
#33 of 42 in Alfred Hitchcock and The Three Investigators
1982 • 1 Reader • 113 pages
#33 of 42 in Alfred Hitchcock and The Three Investigators
1982 • 1 Reader • 181 pages • 3
#34 of 42 in Alfred Hitchcock and The Three Investigators
1982 • 1 Reader • 159 pages
#34 of 42 in Alfred Hitchcock and The Three Investigators
1982 • 1 Reader • 3
#36 of 42 in Alfred Hitchcock and The Three Investigators
1983 • 1 Reader • 137 pages • 3
#36 of 42 in Alfred Hitchcock and The Three Investigators
1983 • 1 Reader • 181 pages • 3
#35 of 42 in Alfred Hitchcock and The Three Investigators
1983 • 1 Reader • 178 pages • 3
#37 of 42 in Alfred Hitchcock and The Three Investigators
1983 • 1 Reader • 145 pages
#39 of 42 in Alfred Hitchcock and The Three Investigators
1984 • 2 Readers • 192 pages • 3
#41 of 42 in Alfred Hitchcock and The Three Investigators
1985 • 1 Reader • 177 pages • 3
#40 of 42 in Alfred Hitchcock and The Three Investigators
1985 • 2 Readers • 176 pages • 4
#42 of 42 in Alfred Hitchcock and The Three Investigators
1986 • 1 Reader • 184 pages • 3
#43 of 42 in Alfred Hitchcock and The Three Investigators
1987 • 2 Readers • 182 pages • 3
#1 of 4 in The Three Investigators: Crimebusters
1989 • 1 Reader
#6 of 4 in The Three Investigators: Crimebusters
1989
#10 of 4 in The Three Investigators: Crimebusters
1990 • 1 Reader • 117 pages • 3
#54 of 46 in Die drei Fragezeichen (Original)
1990 • 139 pages