Every writer I know talks about establishing a great plot. A plot is what makes a book, but how do you establish a plot and how do you know you have a good plot? The plot is not the writing, nor is it the hook. It is the skeleton of your novel. Flesh comes later.
Even query writing depends on this. A query is the tale of the very key skeletal structure. The very main points. You don't tell back-story, you don't show unneeded information. You focus on the key points. This structure applies to all genres worldwide.
Exposition is the information needed to understand a story. (Don't confuse exposition for back-story).
Complication is the catalyst that begins the major conflict.
Climax is the turning point in the story that occurs when characters try to resolve the complication.
Resolution is the set of events that bring the story to a close.