Adding quotes around a novel's title can be a good idea. It makes it clear that you're specifically talking about the title. But sometimes, style guides or the specific requirements of your writing project might dictate otherwise. So, it's best to check the relevant guidelines if there are any.
It depends. If you're referring to the title of the novel in a specific context, like in a bibliography or a formal citation, then yes, you usually add quotes. But in normal text, it might not always be necessary.
Well, generally, when you mention the title of a novel within the body of your writing, it's common to put it in quotes. This helps to clearly distinguish it as the title. However, in some cases, like when you're using the title as a heading or in a very informal setting, quotes might not be used.