On the 'Story Queue' page you can see at a glance which submissions are a part of a novel by the blue book icon next to the story name. You can also see that even if the story name is clipped because it is too long, the chapter and part are always shown.
When you read a submission that is a part of a novel you will see a few differences from other types of submissions:
1) You are able to navigate between submissions by clicking on the gray links pointing back and forward next to the novel title. The name of the novel and the name of the chapter are also separated.
2) You can view the novel by clicking 'view all chapters' below the story title.
3) A 'Novel Information' box is right above the Author's notes. This box will contain Synopsis for previous chapters, synopsis for the current chapter and information about characters and places that the author has filled in. Clicking the links will expand the requested information in the Novel Info box.
If the information is not available the box does not contain the links.
4) Author's notes is novel-global, that is it is identical for all the submissions in the novel except for the information below "Submission notes".
You can freely navigate between the chapters of the novel as long as you are a member of the Queue in which the submission lies. If you are not a member of a Queue you will be instructed on how to become a member. This might be the case when you're reading a novel in the public Queues and the author continues the novel in his private Queue.
If the next submission is still in the 'upcoming' list you can request to be notified when it comes up for review.
You can see all the chapters a member has submitted in his novel from looking at the "Stories" page accessible from his member profile. If you select "Novel Chapters" you will see a list of all submissions that are a part of a novel, whether you are subscribed to the relevant Queue or not (providing the novel itself is not hidden).