The Egg of Immorality is book four in the Thirst for Power series, by Jason Halstead
The savage wilds are neither welcoming nor forgiving to outsiders. It seems an unlikely place for John's Mistress to spread her influence, yet the demon Beytrixxa has bade John plunge into the heart of these lands. His quest to find, explore, and enlist the woman of the isolated island of Mygela.
The Archon and her warrior-women aren't the only residents of these lands, however. Tribes of monstrous creatures threaten their daily existence and covet what the Mygelans have, just as they covet what John has in the form of Jennaca, his huntress and most valued servant.
The balance of power in the wild lands is a precarious thing. The tribal savages may be the most obvious threat, but each day among the Mygelans proves they may not be the most dangerous.
For point of reference, the Thirst of Power series takes place several years after The Goblin Queen. It also involves some mature concepts, themes, and activities.
Keep an eye out for these other Thirst for Power books:
Book 1 - Enchanted
Book 2 - Warlock
Book 3 - Wizard
Book 4 - The Egg of Immorality