What year did the first Harry Potter book come out?
1997
1990
1990
1990
1990
1991
1977
1990
1991
1977
1990
1991
1977
1990
1991
1977
1990
1939
1991
1971
2001
1977
1990
1991
1939
1971
2001
1977
1990
2000
1991
1971
2001
1977
1990
1939
2000
1991
1971
2001
1977
1990
2000
1939
1987
1991
1971
2001
1977
1990
2000
1992
1987
1991
1971
2001
1977
1990
2000
1992
1987
1991
1971
2001
1977
1990
2000
1981
1992
1987
1991
1923
1902
1971
2001
1977
1989
1990
2000
1981
1996
1992
1987
1991
1971
2001
1977
1989
1990
1923
1902
2000
1981
1996
1992
1987
1991
1997
1971
2001
1977
1989
1990
1976
2000
1981
1996
1923
1992
1987
1902
1991
1997
1971
2001
1977
1989
1990
1976
2000
1981
1996
1992
1987
1991
1997
1923
1902
1971
1995
2001
1977
1970
1989
1990
1976
2000
1981
1996
1907
1993
1992
1987
1991
1978
1997
1971
1995
2001
1977
1970
1989
1976
2000
1981
1996
1993
1992
1987
1991
1978
1997
1907
1931
1971
1995
2001
1977
1970
1989
1976
2000
1981
1996
1993
1992
1987
1991
1978
1997
1971
1995
2001
1977
1970
1989
1907
1931
1976
2000
1981
1996
1993
1992
1908
1987
1991
1978
1997
1971
1995