Okay, so adding suspense to a novel is difficult business. And as science fiction and dystopian authors have a little bonus--they can use their sometimes scary and tense societies to build suspense. (There is the added drawback of having to develop and explain such societies too, so we don't have it totally easy!)
Here are a few tips for adding suspense to any novel, science fiction or not.
1. Chapter endings. Now I've heard people say to end them on a cliffhanger, but I actually don't think that's entirely true. You don't have to have an explosion at the end of every chapter, or a gun going off for it to be impactful.
The best advice I've heard is to end the chapter in one of two ways: a high or a low. And it can be a plot high or low, or an emotional high or low. Both bring the urge to turn the page, and build the tension for the next chapter.
Notice I didn't have to use sci fi/dystopian titles for the examples. Any reading you do, identify the high/low at the end of the chapter. Use what works for you.
2. Shorter sentences. When I'm building up to a reveal, or writing a particularly fast-paced scene, I like to use shorter sentences or paragraphs. I find myself using repeats and echoes a lot, as I think this draws out the tension before the big reveal.
The white space allows breathing room, and the shortness of the text means the reader can read really fast.
All of that adds to the tension of the reading experience, in my opinion.
3. Evil villains. I think one of the reasons Harry Potter was so engaging is because Lord Voldemort is truly evil. He's scary whether he's on the page or not. I think every book can be benefitted from having a really evil villain.
Of course, if you're not writing fantasy or science fiction, there often is no huge, overarching villain. In cases like these (see VIRTUOSITY example above), rely on the emotional impact of your story.
What techniques do you use to add suspense to your novel?