What usually happens is this: (Taken from current experience reading an author new to me) There is a prologue that feels somewhat detached from the main story. It gives us a lot of information, though nothing active, nothing that grabs us and gets our heart involved. Now, this heart involvement can come in many forms, from a pounding from suspense or fear, to a twittering from excitement, to a warmth from a feeling of romance or love. These are just some of the elements of a story that hook us and reel us in. So, this current book I am trying to read has not grabbed me. Now on the fourth chapter and nothing significant has happened yet, nothing is tugging. The summary on the book jacket made the story sound very compelling, very exciting. But so far there is nothing to suggest that there will be a decent pay-off at the end.
Don't ask which book I am talking about because I am not going to tell you. Sorry! Not trying to be mean to anyone here, so no names or titles will be mentioned.
I have a theory. Now, I might be way off with this but it's just a theory, it's just my opinion and personal observation. Prologues are a crutch. It's easier for a writer to get into the story and bring readers up to speed if they summarize a bunch of "important" information in the beginning. My feelings about this? If it's vital to the story, then it can be part of the story. If it's something important from the past of one or more of the characters, then it should be worked into the main body of the manuscript. Don't pull it off to the side like a sidebar or an endnote or something. If it's truly important then give it the respect it deserves. Is this easy? In most cases my guess would be no, it's not. Which is why we see prologues.
Here are some things to consider before using a prologue:
Is the information really important to the story?
Is it possible that you are starting the story too late?
Are there ways that this information could be incorporated into the main text so that it is more dramatic?
Example: In Red Dragon by Thomas Harris, there is some important backstory that we need to know about Francis Dolarhyde. Harris could have very easily put it all into a prologue. But had he done that it would have been boring because we had no reference point yet. Instead, after a few chapters he orchestrated a flashback (another device that needs to be used sparingly). What he has done is introduce us to the Tooth Fairy, this heartless and brutal killer of entire families, and make us curious about how he became what he is today. Once he had our attention, once we were on the edge of our seats reading with all the lights on, then he took us back in time. But he didn't TELL us anything, he SHOWED us. We got to see first hand how this poor little boy became a heartless killer. Harris makes us almost feel sorry for Francis. What Harris definitely succeeds in doing is showing us how Francis has justified his actions to himself.
Something I read once had to do with the shooting of movies. Each scene, even if there is no action at all, costs $35,000 to film. So a director needs to ask himself about every scene: is it worth $35,000? If not, cut it.
A similar question: Does this scene help the story? Does it move it forward? Or does it bring the action to a halt?
Bottom line: Time is just too short. There needs to be a pay-off in the immediate future to compel readers to read your story. Backstory is not compelling. Prologues (in almost every case) are not compelling. With a prologue, you have, more often than not, given your book two strikes. If your reader sticks it out and goes on to Chapter One, it had better be incredible, because otherwise it's strike three and you're out.
As I mentioned, like with every rule, there are exceptions. But if you're choosing to be one of those exceptions, make sure it's for the right reason and not because to NOT do it would be harder.
