Editorial process begins for fiction author who has already written book. Author delivers on time. Queries are sent to author. Sometimes publisher solicits great quotes for book jacket. Editor reviews and, if corrections, inputs onto disk.
Publisher decides, based on advance sales, advance paid, etc., how many to print.
Foreign and other subright sales efforts begin. Sometimes, publicity department sends out galleys or bound galleys to reviewers. Publisher sends book to reviewers, radio stations, newspapers with a press release. Books arrive in bookstores. Author may do some book signings, radio programs, maybe tv, maybe public speaking, and rarely, a paid tour .