Which manual of style would you suggest to check punctuation in a novel?
Realistically, they're much of a muchness. If your readers are saying you're overusing commas, I'd pay more attention to that as a separate problem than to any particular manual.
sorry i see what you mean. it just didn't occur to me that other writers may go by what a manual says.
i use punctuation instinctively -- comma where I want the reader to slow down, semicolon where i want them to pause briefly, etc. like writerBN says, a style manual goes only so far... a novel is a living, breathing entity, while the style manual has more of a manufctured existence.
A novel is a living, breathing entity, and grammar, punctuation and sentence structure are the skeleton that holds it up and gives it shape. Stretching the analogy, a style manual is like an anatomy text: it tells you that the knee bone is connected to the shin bone, so you can build the shape of living creature that you need.
Unless your instincts are very, very good, using punctuation instinctively is going to harm your ability to convey your meaning to your reader. Commas and semicolons do more than simply indicate where a reader should breathe.
A comma can be used to set a phrase, like this one, apart from a sentence. It can be used to delineate a sequence of words, phrases, or terms. It can even be used to address the reader, zarada.
Meanwhile, semicolons are used to join two sentences together. Each should be grammatically complete on its own; they merely share a topical relationship.
On a very practical level, people are a lot less likely to buy your work if your punctuation (and capitalization) aren't within grammatical norms. Unless you're James Joyce, readers don't like weird grammar. And the level of editing required to correct it is expensive and time-consuming.