Genette splits this book into five sections: "Order," "Duration," "Frequency," "Mood," and "Voice." As you can see from these titles, the first half is focused on issues having to do with time, while the later sections are more about how the tone and viewpoint of a narrative are created.
Here, Genette takes the term "diegetic" as the basis for a load of related terms ("heterodiegetic", "homodiegetic," and yeah, it keeps going) that help define the particular type of narrative that you've got on our hands. Also, Genette's distinction between "focalization" (the question of who perceives) and "voice" (who speaks) has come to be seen as a key addition to narrative theory.
According to Genette, what factors go toward creating the "mood" of a narrative?
How can we tell whether narration is homodiegetic or heterodiegetic?