Malicious Intent. The Bastian Sagas, #1

No one said that being a Mercenary was easy, with long stretches in the saddle only interspersed with intense-yet brief-bouts of excitement, not to mention the incessant harassment from every rogue and rake when one is lucky enough to find an inn for the night. Nor had Sasha ever intended her hunt for the thief who killed her twin sister to take more than a decade to track down, but she had discovered the Mainland was much more expansive than her homeland island of Sebastia.
But Sasha's vengeance knows no bounds, and despite the slog of traveling and hunting down a paycheck, she finds herself in more sticky predicaments than she had ever anticipated. Her solitary lifestyle has brought her few friends, and even fewer confidants to lend an ear, or even a hand, and her overly-independent nature might be the very thing that ends up destroying her if she doesn't learn to curb her quick tongue, not to mention her easily heated temper, and grab the hand freely offered to her.
Vengeance is a hard road to travel, and is likely to blind the acutely-driven, and as the roads grow longer than the years, becoming disheartened and jaded is likely to drive her over the sword-edge she's traveled for so long. Until she falls into the path of a fellow Mercenary who can not only stand toe-to-toe with her, he subsequently shakes her foundation to the core, but Sasha's stubborn nature might still drag her down.
Her worst enemy is not the rogue thief who slaughtered her twin, but the voice in her head that won't listen to reason. And even going home to Sebastia turns out to be mistake.