It takes time, a great deal of research, and a lot of planning. Even after the first draft is written there's a ton of work to be done. Depending upon the publisher, the book can go through upwards of five or six edits. Following that the book goes to a graphic designer who places the pictures, sets the text, and basically decides what the end product will look like. The entire process can take several months if not years. So it was with complete shock that upon receiving my latest book Texas Safari: The Fishing Guide to Texas (blatant plug) that I discovered one major grammatical problem: the word "each" was omitted.