Just a quick question: Is it acceptable to start a novel with dialogue?
Yes and no.
I've heard in several places (all agent/editor blogs. One of them was Author!Author!) to avoid starting with dialogue. Come to think of it, I've heard this bit of advice on other writing forums, too.
The reason is, when you start with dialogue, you drop the readers in the middle of something. For most writers, it's an argument, battle, etc. It's disorienting. Nobody knows these characters yet, so they don't really care what situation they're in. I haven't seen a novel pull it off yet. The line has to be stunning; it really has to hook. . . then it has to fit in with everything else.
Your first line helps set the tone of your entire story. So if you have a real zinger of a dialogue line, then that sets the tone for the entire story. I'm not saying a reader will go through your story, saying, 'hot damn that first line sizzled, why don't the rest of the words sizzle?' I'm saying if your entire story doesn't deliver that quality found in the first line, then it will be sort of disappointing. And if the line's a bad one? Readers will wonder if you were drunk when you wrote that line and liked it so much you decided it should stay anyway.
Like almost anything in writing, however, you can make this work. I've never seen it done well, but I'm sure fellow AWers can come up with at least one work that does start with dialogue well.
For most people, it's best not to open with dialogue, I think.