In what year was the first book in the Han Solo Trilogy released?
1997
1977
1977
1977
1977
1977
1977
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1979
1977
1978
1979
1977
1978
1979
1978
1976
1979
1978
1976
1979
1978
1981
1976
1979
1978
1981
1976
1979
1978
1981
1976
1979
1978
1981
1976
1979
1978
1981
1976
1978
1981
1976
1978
1981
1976
1978
1981
1976
1980
1978
1975
1981
1976
1980
1978
1975
1981
1976
1991
1980
1978
1975
1981
1976
1991
1980
1978
1975
1981
1976
1983
1991
1973
1980
1978
1982
1975
1981
1976
1983
1991
1973
1980
1978
1982
1975
1981
1976
1983
1991
1971
1973
1980
1978
1982
1975
1981
1976
1983
1991
1971
1973
1972
1999
1984
1980
1978
1982
1975
1981
1976
1983
1991
1971
1973
1972
1999
1984
1980
1982
1975
1981
1976
1983
1991
1971
1973
1972
1999
1984
1980
1982
1975
1981
1976
1983
1991
1971
1973
1972
1999
1984
1968
1964
1980
1982
1975
1981
1983
1991
1959
1971
1973
1972
1999
1984
1968
1964
1980
1982
1975
1981
1983
1991
1985
1959
1971
1973
1972
1999
1984
1988
2007
1968
1964
1980
1982
1975