One of the things during the course of my technical writing career and association with certain fiction book authors and editors is that fiction should have a set layout and follow a line of flow, just like any other document for any other purpose. What that means is, regardless that a fiction novel is historic, romantic, scifi, horror, or any other type; it should always begin with "action". This is to grip the reader from the very beginning and draw them into the book.
This is similar process to business proposals and investigation reports where problems are stated at the very beginning, including in the "executive summary". From here, other elements are added. For the fiction novel, however, these other elements are "mystery" and "emotions" with pauses in between. Its like surfing waves, you have peaks (action, mystery, & emotions) and valleys (pauses - these divide the peaks from each other so that the reader can catch his or her breath). This is what gives forward movement to a story. However, should the peaks wander together it can overwhelm the reader, giving them a very unpleasant experience.
A good example of this is the contrast between the movies "Batman Begins" and "Dark Knight". "Batman Begins" has a terrific flow with story line. It gives the reader time to recover from the previous "peak" and catch his breath. (I have personally watched this movie at least 20 times).
"Dark Knight" is different, however, and gives a different affect. Although the story is well written, from about the middle of the movie the "action" becomes high pitched and virtually non-stop. And because of this, it becomes exhausting for the viewer. (For me, it was very good, but I've only watched it once and it will be a long time before I play the DVD again). In certain aspects, it makes the movie actually mentally painful to watch, regardless of how good it is. Had there been just a few pauses in this area, I think it would have been equal to "Batman Begins", but as a result it falls short.
The bottom line to all this is that if you writing any novel, be sure to take care in timing your peaks and valleys right. Be sure to use "pauses" in between the "peaks", because it just might make the difference between a good novel and a bad one.