Venators Series by Devri Walls, Daniel Thomas May

It has been mere days in the world of Eon, where Rune Jenkins, her twin brother Ryker, and their friend Grey have been trapped, fighting for their lives. After discovering the truth of their ancestry, the three are far from home, and far from anything resembling their mundane lives of the past.While Ryker is still held captive by the eerily beautiful Zio and her goblins, Grey falls into the clutches of Feena, the Fae queen... moreIt has been mere days in the world of Eon, where Rune Jenkins, her twin brother Ryker, and their friend Grey have been trapped, fighting for their lives. After discovering the truth of their ancestry, the three are far from home, and far from anything resembling their mundane lives of the past.While Ryker is still held captive by the eerily beautiful Zio and her goblins, Grey falls into the clutches of Feena, the Fae queen. She begins to drain his soul bit by bit to feed her dark underground garden, and Grey has no hope of escaping on his own.It is now up to Rune to save Grey, as his precious time slips away inexorably. But the Council has denied her permission to embark on a rescue mission, until she can harness her Venator gifts and prove herself capable of venturing into the Fae queen's territory. As Rune discovers that promises in Eon are forged with life-or-death consequences, she realizes that she must act quickly, or else be swallowed and Grey along with her by the dangers of Eon. less

The path will be forged in sweat and blood. Rune, Grey, the shape-shifter Beltran, and willful vampire, Verida, set out to rescue their friend and mentor, Tate, from the gladiator games. But first they must navigate the perils of Eon and its warring factions. Each of this band of four carries with them a secret that threatens to tear their group apart from within... moreThe path will be forged in sweat and blood. Rune, Grey, the shape-shifter Beltran, and willful vampire, Verida, set out to rescue their friend and mentor, Tate, from the gladiator games. But first they must navigate the perils of Eon and its warring factions. Each of this band of four carries with them a secret that threatens to tear their group apart from within. Rune now bears the mark of the promise she made to save Grey's life--a nixie bubble lodged in her arm that could call her away to do their bidding or spell her death. Even as their loyalty to their cause and to one another faces its greatest test, Rune's twin brother Ryker is forging an alliance with their mortal enemy, the powerful sorceress Zio, who has plans of her own for the Venators and Eon. Hearts will be bared, secrets unveiled, and relationships made and destroyed in this stunning new installment of the Venators series. less