This is the 1388th most frequent Japanese word.
出版
Publication.
In this sentence, '出版する' is used as a verb to indicate the action of publishing a novel.
彼は新しい小説を出版する予定です。
He plans to publish a new novel.
'出版する' is again a verb here, emphasizing the company as the agent of publishing books.
その出版社は多くのベストセラーを出版してきました。
That publishing company has published many bestsellers.
Here, '出版' is used as a noun ('publishing') within the term '出版業界' ('publishing industry').