The Elysian Elements series by Sam Hirse contains four books, the second of which is currently being written. More books, potentially in the form of e-book novellas, are planned.
Book 1: Sky of Stone
In the world of Elysia, eight tribes of Elmen - creatures granted the powers of a specific element - have lived together for centuries. But they have also lived in fear: Lumeon, the godlike Keeper of light itself, has shared a prophecy that speaks of great darkness taking over the planet. Only the foretold Hero of Light can stop it and its minions, the Shadows, from destroying the world.
The year 1,000 - the year of darkness - is halfway over, and while the Shadows' attacks have grown more vicious, the Hero of Light is nowhere to be seen. Geb, a young guard of the Earth Tribe, can't continue watching how more and more Elmen succumb to the dark forces. Together with his newfound friend, the Sky Elmin Iris, and their animal companions, he sets out to find the Hero of Light on his own - not realizing that by doing so, they are not only putting their own lives at stake, but also rekindling the spark of a war long over...
Book 2: Forest of Flames
Geb and Iris may have defeated the Shadows once, but their journey is far from over. Still dealing with the shocking revelations learned in Sky Tribe territory, the friends head to Zesto, hoping that Fuocith, Keeper of Fire, can give them their urgently needed answers. But across the ocean, all they find is death, cruelty - and danger. The Fire Tribe is all but welcoming to them, and yet, when one of their new enemies gets attacked by an even bigger threat, the friends don't hesitate to help him, even if it means a detour from their plan.
Between reptiles as big as houses and sentient trees, the Shadows are not the only problem the four friends have to face. A mysterious stranger follows their every move, an old enemy returns... and the biggest threat to their mission might in fact be one of their own.
Book 3: Sun of Shadows
Book 4: Dawn of Darkness