Conversation so far:
When did Card start writing science fiction?
was eventually purchased by Ben Bova at Analog Science Fiction and Fact and published in the August 1977 issue.
What was the name of the story Analog published in August 1977?
He wrote the short story "Ender's Game" while working at the BYU press.

Question: So, Ender's Game was first published in Analog magazine--when did it become a book?
Self-contained rewrite: So, Ender's Game was first published in Analog magazine--when did it become a book?