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Debut Novel – Heart of a Bowman

Rising from the Endless Sea is the Vertical Horizon, a massive rock spire holding four tiers of kingdoms. Four Truth Stones, one for each of the spire’s interdependent tierdoms, help maintain a delicate power balance. But when a stone is stolen, the Spire is plunged into war.

Seventeen-year-old Princess Aratess of Ardenia is destined for the shallow life of the royal court—and an arranged marriage to a selfish prince—but she longs to serve her people in a different way. For years, she’s practiced archery in secret, and when the chance arrives, she matches her talents against Colt, an elite King’s Bowman.

Fiercely loyal to the crown, twenty-year-old Colt questions how his mother’s people, the Reyjik, could betray the Realm. He also questions the judgment—though not the skills—of the fiery young woman who has inserted herself into his mission. Tess keeps her identity a secret, knowing Colt would forbid his princess from risking her life. Colt, meanwhile, strives to keep a secret of his own: his growing feelings for Tess.

As Reyjik overrun Costair’s capital, Colt and Tess escape skyward to warn the King of Ardenia and mount a counterattack. Desperate, they enlist the help of Deacon, Colt’s estranged childhood friend and a lighter-than-aircraft pirate. Will Colt, Tess, Deacon, and a motley crew of pirates prove enough to stave off invasion and turn the tide of war?

What people are saying about Heart of a Bowman

⭐⭐⭐⭐⭐

In Heart of a Bowman, Jil Koller takes readers into a fantastical, multi-tiered world of flying ships, pirates, love, honor, betrayal, and stones of truth. Settle in with a blanket and hot drink because once you find yourself deep in the realms of the Vertical Horizon, you won’t want to leave. Not until the last secret is revealed and the outcome of every battle—of wits or of bows and arrows—has been determined.  

Sara Davison

Award-winning author of Lost Down Deep and Driven

⭐⭐⭐⭐⭐

Heart of a Bowman is a non-stop epic adventure, that you won’t be able to put down. Jil Koller creates a magical vertical world on the brink of war, and two heroes who will risk everything for peace, and each other. You’ll embark on the Dancing Girl, a lighter-than-air ship, and you won’t want to get off.

Chelsea Dyan

Social Media Influencer – @gratefulheartcollective

⭐⭐⭐⭐⭐

Jil Koller hits a perfect bull’s-eye in this stunning fantasy debut featuring a pair of archers who alone can save their kingdom; a sweet, slow-burn romance; a fascinating, original, and beautifully imagined world; a colorful cast of characters (including pirates!); and vegetarian dragons. Heart of a Bowman captured my heart from start to finish, and I’m so excited to find out what happens next!

 J. J. Fischer, award-winning author of The Nightingale Trilogy, The Soul Mark Duology, and the Painted Wind Series

Vertical Horizon Series

Book cover for 'Heart of a Bowman' by Jil Koller, featuring the title prominently with two characters in a fantasy landscape, a tall mountain, and airship in the background.
Book cover for 'Heart of a Spy,' the second book in the Vertical Horizon series by Jil Koller, featuring a gradient background with the title prominently displayed and a note about the upcoming cover reveal.