Obsidian Sky (Riftborn Series Book 1) by Jill Aster

Obsidian Sky (Riftborn Series Book 1)
by Jill Aster
Feb 2, 2026
Genre: Dragon Rider Romantasy

Enemies to lovers
Trainer to trainee
Morally gray protector
Fated bond
Deadly training academy trials
Hidden lineage
Dragon-rider fantasy
Forbidden romance
Love and destruction
High-stakes political intrigue
Destiny/prophecy
Elemental magic system
Immersive fantasy world-building
A hidden bloodline. A waking prophecy. A love that could either save the realm or end it.

Thaelyn Marren enters the Asgar Training Academy wanting nothing more than to prove herself amongst the other cadets, where she must endure life-threatening trials in the hope of manifesting air, water, fire, or earth magic. Not to mention, a lucky few will pair with dragons who select their riders with ancient instinct, answering only to those whose souls burn bright enough to match their own.

When Thaelyn’s power stirs in ways no instructor can explain, she draws the attention of the crown, particularly Prince Thorne Dareth, a renowned warrior and a dragon rider. Hardened by discipline and haunted by a kingdom he was born to serve, Thorne sees Thaelyn as a danger to the realm and yet is charged with her training. And amidst clashing personalities, an undeniable pull forms between them, potent enough to awaken dark forces that once tore the world apart.

Now rift-born creatures thought to exist only in nightmares are slipping through the cracks of their reality. And as they push the realm toward open war, Thaelyn may be the only one able to stop what’s coming. That is, only if Thorne can choose between loyalty to his crown or the girl whose power could either save their world or bring it to ruin.

Triggers: This story includes elements of war, battle, perilous situations, and open-door sexual content.

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About the Author:
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Jill Aster writes epic fantasy romance. She's a published curriculum writer and holds a Master’s Degree in Curriculum and Instruction. Her background in education, which earned the distinction of Master Teacher, has refined her storytelling craft, world-building skills, and character development. Obsidian Sky is her debut fantasy romance and the first book in a planned series titled Riftborn. When she is not teaching literature, writing or reading, she enjoys cooking, baking, photography, and spending time with her husband, two adult children, and their pomsky, Onyx. 

Jill has loved fantasy books and been mesmerized by dragons since she was a child. When she decided to write her debut novel, Obsidian Sky, she knew it must contain dragons. Her debut novel, Obsidian Sky is book one in the planned Riftborn Series.