The Deviant Future Collection #2. The Deviant Future, #0.5

In a Deviant Future, humanity has mutated and the world is a more violent place, but one thing hasn't changed at all-the lust for power. In these three, previously published novels, a post-apocalypse humanity is struggling to survive and rebuild. But it's not enough they have to contend with nature's threats-those who rule are even more dangerous. Catastrophic Attraction ~  Roark made himself King and in the process acquired enemies.
Now, it's up to him and his new bodyguard to show the other kingdoms they won't be bullied. Iron Pirate ~ Darius has been sailing the treacherous seas for a decade now b ut any plans for a quiet retirement walk the plank when he discovers the Princess Shereen has stowed away aboard his ship. Ash Princess ~ The Diamond Kingdom is covered in ash, but when Cam goes to find the cause of it, he discovers a princess in need of rescue.