I already posted this in the other thread regarding the first 5 pages- but I will add it here too in case people are being exclusive in their reading of this topic
Listen, a request for the first 5 pages is simply to check on how effective the writer is at suspending disbelief at conveying a world, fictional or non-fictional, suspended by the author's words. Publishers want to know several things, and among them: how good is this writer at his craft? can he set up what seems to be shaping up to be a good story? Publishers want to put books out there that catch fire. This means those stories that people at the core of the reading community, once they read it, run to their friends, family, and neighbors and shove it in their face, exclaiming, "read this! You'll thank me." And by such means, seeded throughout the coutryside, good stories find their foothold. No publisher is flawless- J.K.Rowling got rejected from numerous publishers before her story stuck. It was, however, a good story well told- which is what we must all strive for. Don't worry about publishers as much as the story itself. Know your world, know your voice, know your aim, and craft a beautiful story. This is simply stated, but one of the hardest tasks in the world. It is, however, what we writers do.
Now, the whole first 5 pages business, like I said - bring the readers in to the way you tell your story. Don't fall into the trap, either, of dumping info here... for by putting trust in your readers, you build up a relationship of trust that carries readers, hopefully, to the end of your novel with few stopping points for eatting or sleeping. Publishers are making sure that
you don't take excessive time doing this. Plot doesn't matter as much as being able to draw readers, and build that trust. For everyone the way this task is accomplished is different, but the mission is the same. Take hold of your reader and their emotions, and don't let them feel like coming up for air till the very end of your ride... and at that end, mark them forever with your tale.