D
Dan Wells
Partials Sequence
In a post-apocalyptic world, humanity faces extinction from a virus that killed most of the population. A group of teens seeks a cure, navigating a dangerous landscape and uncovering secrets about the war that created the Partials.
The series begins with "Partials," followed by "Fragments," and then concludes with "Ruins." There is also a prequel novella, "Isolation," which can be read before "Partials" or after the main trilogy.
The author, Dan Wells, has not written any direct spin-off series from the Partials Sequence, nor does it connect to his other works.