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Welcome! If you are looking for an epic tale that defies categorization, you have come to the right place.
The five-book series is complete and you can read t
he first for FREE! Learn more below.
For ALL the news about my fiction, subscribe to my 
mailing list.​​

​​The Passion Season ​is FREE at various digital booksellers.​​
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​The Passion Season 
The Covalent Series
| Book One
is FREE through
​this universal link.

​
​In ancient times, powerful aliens walked the Earth. Now, only one remains.
 
Exiled for the sins of his father, Barakiel accepted his solitary life until Special Agent Zan O’Gara showed up at his door investigating a ritual murder. He suspects his father is behind the gruesome crime and knows he should stay away from the beautiful FBI agent, but his discipline fails him.
 
Zan believes Barakiel is a wealthy businessman with information vital to her case. As her investigation brings her closer to the truth about him, he learns his presence on Earth has placed vulnerable humans in danger. Compelled to protect them, he undertakes a series of duties he may not survive.

“Barakiel is a fantastic hero—weird, complex, enigmatic, but also compassionate and sensitive. . . . Zan is an amazingly strong heroine and so easily relatable that readers will just love her too.”
​― InD’tale Magazine

​
WARNING: This book contains foul language, violence, explicit sex, and sexual violence. Adults only! This is not a stand-alone novel, but the first in a series. All five books in this epic love story are now available. The Covalent Series is complete!
​

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​The Pain Season
The Covalent Series
| Book Two
​Universal Link
​
​
On the night of the equinox, Zan O'Gara learns monsters are real.
 
When Zan can no longer deny Barakiel is hiding things, she confronts him. He assures her he will soon share his secrets, but Zan dreads the day, afraid the love of her life is connected to a ritual murder. Her heart won’t allow her to believe he could harm an innocent man. The truth is worse than she could have imagined.
 
As Barakiel’s power as a warrior grows, so does the strength of his father’s obsession with him. Lucifer spreads his dark tendrils through the Earthly Realm using a network of depraved men and Barakiel soon realizes his love has drawn a target on Zan’s back.

Events at the autumnal equinox make this clear to Zan as well. Barakiel has lied to her. And so begins a season of pain and rage. A season of traitors and war. 

"Good lord . . . even better than the first. I cannot tell you fast enough to read these books! Action, mystery, and a REALLY steamy romance makes for an incredible read. Libby Doyle gets better with every second!" 
​ 
― J.M. Bush, author of Storm in Shanghai.
​
​
WARNING: This book contains foul language, explicit sex, and violence. Adults only! The Pain Season is not a stand-alone, but the second in a series. All five books in this romantic science fantasy are now available. The Covalent Series is complete!
​

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The Vengeance Season
The Covalent Series
| Book Three
​Universal Link
​
​​
To keep her safe, he will confront his evil father. To keep him strong, she will overcome horrors no human has ever faced.
 
After explosive events at the winter solstice, Zan is happy to sink back into her job with the FBI. She should have guessed her normal times wouldn’t last. Barakiel loves her and Lucifer—his ruthless father—knows it. 
 
When Barakiel learns his father is searching for the means to navigate the cosmos, he fears Zan is in grave danger, not to mention the citizens of his homeworld. Lucifer could appear in the Earthly Realm at any moment. He could appear on the manicured terraces of Covalent City.
 
​The solution is clear. Barakiel and his allies must convince the Covalent leadership to march on the Destructive Realm.
 
They must take the war to Lucifer’s Keep.
 
"I just couldn’t put this book down. Tense, fulfilling, vivid, and satisfying, this action-packed, character-driven tale of love, horror, honor, and despair will keep you glued from the first page to the last."
​
― K.J. Simmill, author of the award-winning Forgotten Legacies Series  
​
WARNING: This book contains foul language, violence, explicit sex, and sexual violence. Adults only! The Vengeance Season is the third novel in a five-part series. All books in this epic science fantasy are now available. The Covalent Series is complete!
​

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​The Warlord Season
The Covalent Series | Book Four

Universal Link
​
Tyranny often comes from within. Beware the warlord.
 
The battle in the Destructive Realm is over and Zan O’Gara wants to love her mate in peace, but nothing is ever simple when it comes to the Covalent.
 
​With many warriors wounded or exhausted by the fight, a new villain sees an opportunity to take power. He imprisons the Council and the healers. He hunts any warrior who refuses to submit to his authority. He throws Pellus’ mate into the Wasteland Dungeons.
 
An attempt on Barakiel’s life while he is in the healing sleep forces Zan and Pellus to flee to the Earthly Realm with the warrior long before he recovers from his wounds. Despite his injuries and loss of Balance, Barakiel pledges to reunite Pellus with his beloved. He vows the warlord will pay for this injustice in blood.

​
WARNING: This book contains foul language, violence, and explicit sex. Adults only! The Warlord Season is the fourth novel in a series. The epic love story concludes with Nuzan, the fifth and final book of The Covalent Series, available now. The Covalent Series is complete!
​

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​Nuzan
The Covalent Series | Book Five

Universal Link


Within the king’s mind lies the key to giving the queen new life. If only he would accept it.
 
Barakiel tamed the elemental force of Destruction in all aspects but one. He could not save his mortal queen, his beloved Zan O’Gara. 
 
Afraid that Barakiel will choose death rather than live without her, Pellus and the healers clone the queen, intending to awaken her with her memories intact. They fail. Barakiel treats the innocent new Zan like his child, even though—on some level—the clone remembers the queen’s love for her mate. Pellus attempts to convince the king that if he and Nuzan were to bond in Union, Zan O’Gara would be restored. Steeped in grief, Barakiel rejects his old friend’s schemes.

​Nuzan must find her own way. She must learn to cope with the queen’s memories, stirring deep inside her.

WARNING: This book contains violence, foul language, and explicit sex. Adults only! 

​The Covalent Series
 is complete. Enjoy!

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​​What is a covalent bond?​​
A bond in which one or more pairs of electrons are shared by two atoms to create a stable balance of attractive and repulsive forces.
​


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The first edition of ​
The Passion Season
 was
the 2016 Medalist in Fantasy
, 
New Apple Awards for Excellence in Independent Publishing

The Pain Season was the 2017 Medalist in Science Fiction, New Apple Awards for Excellence in Independent Publishing
​
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I'm an Ethical Author Small
The Covalent Series is published by Fairhill Publishing LLC.
The Passion Season, The Covalent Series | Book One, 2 Ed. Copyright © 2018 Libby Doyle.
The Pain Season, The Covalent Series | Book Two. Copyright
© 2016 Libby Doyle.
The Vengeance Season, The Covalent Series | Book Three. Copyright © 2018 Libby Doyle.
The Warlord Season, The Covalent Series | Book Four. Copyright © 2020 Libby Doyle. 
Nuzan, The Covalent Series | Book Five. Copyright © 2021 Libby Doyle.
The Covalent Series: science fantasy series, urban fantasy books, romantic science fiction, science fiction fantasy romance, strong female lead, alien warrior books, science fiction thriller, alpha male, alpha female, erotic fiction, mystery, suspense, romantic suspense, adventure, FBI, angels, myths, mythology, legends, metaphysical fiction, genetic engineering

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