3.87 avg rating — 7,459 ratings

"This exceptional novel fulfilled every sci-fi/horror wish that I had and didn't know that I had. I'd been wanting a YA novel with Alien franchise vibes, and this hit it. "

3.78 avg rating — 2,848 ratings

"Sequel to Contagion and everything I said about that applies here, too!"

3.85 avg rating — 851,977 ratings

"Book Riot calls this sci-fi/horror and as it's once of my favorite novels, I'm happy to vote for it on this list. 10/10 recommend to read! It qualifies under YA or New Adult (IMO) as the characters are children and enter early adulthood.
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