Steelborn (Deluxe Limited Edition) (The Steelborn Saga, 1) by Taylor J. LaRue

This DELUXE LIMITED EDITION is available while supplies last and features:
* Gilded silver edges
* Illustrated endpapers
* A foil-stamped case cover
* Special effects on the jacket

 Never run. Never bow. Never die.

Reya Connery became the Crimson Dagger, the most notorious thief in Rhiterra, by following a strict set of rules. One: There is no honor among thieves. Two: A good blade is key to any negotiation. Three: Only the dead keep secrets. And Reya has a secret that must be kept at all costs. But when a heist goes wrong on the eve of paying off her debt to a ruthless crime lord, Reya may need a new set of rules. And lots of coin. Fast.
 
Enter Caelan Halcyon, an immortal warrior whose magic makes him a valuable target—if the curse inching closer to his heart doesn't kill him first. There's just one person who might be desperate enough to try and get their hands on the fabled cure in time to save his life, someone whose legend claims they can steal anything: the Crimson Dagger. A male of honor, Caelan loathes everything the beautiful, cocky thief represents, yet knows that Reya is his last hope for survival. 
 
Their search takes them to the edge of the known world, where Reya discovers that there is far more at stake than her and Caelan’s own lives. Now, Reya must confront deadly foes, her growing attraction to the immortal who is as lethal as his jawline is perfect, and the rage she's spent a lifetime trying to bury. This time, her daggers aren’t going to cut it, and the fate of all magic-born hangs in the balance.

Enter a world ruled by tyrants and thieves, where magic is outlawed, revolution brews, desire is dangerous, and an impossible cure may prove deadlier than the curse.

Tropes:
* Slow-burn romance
* Enemies-to-lovers
* Deadly curses
* Tortured immortal hero
* Secret identity
* Forced proximity
* Found family
* Only one saddle