His many novels included ''The Puppet Masters,'' ''Starship Troopers,'' ''The Moon is a Harsh Mistress,'' and ''Stranger in a Strange Land.'' He also wrote numerous novels for young people, including ''Double Star'', ''Citizen of the Galaxy'' and ''Star Beast''. | His many novels included ''The Puppet Masters,'' ''Starship Troopers,'' ''The Moon is a Harsh Mistress,'' and ''Stranger in a Strange Land.'' He also wrote numerous novels for young people, including ''Double Star'', ''Citizen of the Galaxy'' and ''Star Beast''. |