The Sin Soldiers - Fragments

Veronica Roth's Carve the Mark meets Pierce Brown's Red Rising in this scorching hot young adult science fiction debut.
"***WARNING: Only start this book if you have hours to spare!***
I started this book at 10:00 pm. I almost saw the sunrise when I finished, hours later. And then cursed the fact that I would have to wait another year for the sequel."
Verified Reviewer
The red compound makes them angry.

Yellow exhausts them.

Blue drives them into a state of ravenous addiction.

The thief Kai knows about the chemically controlled soldiers of the Eastern forces and their savage, deadly nature.

When a robbery attempt at Club Seven goes wrong, Kai is captured and wakes up inside the military base, her twin brother, Dex, missing. Things go from bad to worse when Kai is started on a training regimen and forced to take injections of the blue compound.

The scientists in charge plan to make her into a working soldier who will mine the mysterious power crystals beneath the desert. Kai becomes a victim of the bully Finn, a handsome but nasty soldier whose years on red compound seem to have erased his humanity. Still, she begins to pity the soldiers, who appear to be nothing more than genetically enhanced, drug-controlled teenagers.

Elsewhere, Dex and his tech-savvy boyfriend try to crack the soldiers' chemical code to find a weakness that will break the system, but Kai has already been drawn deep into her new world.

Strong feelings for the soldiers she's come to know have started to cloud her judgment. Can she escape and find Dex without becoming a monster herself?

The Fragments Series is best enjoyed in this order:
The Sin Soldiers
The Crystal War
The Hollow World