Lately I’ve been noticing a lot of duology series – 2 books only – instead of trilogies. This seems to be specifically for science fiction in YA. There are also some “series” composed of companion novels – novels set in the same (or a similar) universe, but not following the same exact storyline as the first book.
I absolutely love this trend. I wish that more genres of YA would follow it.
Below are a bunch of YA sci-fi duologies & companion novel series. I’ve read all of them, or at least the first book in the series, and absolutely loved them all!