The Cave of the Six Arrows by Len Boswell
When 15-year-old Rhynt, a disabled but fierce girl with magic skills, decides to run away from a powerful, demanding monk, the last thing she expects is to be taken under the wing of a legendary warrior.
There’s just one problem. The warrior, Calax Halfhand, is being pursued by assassins. Worse, he's now on a mission to find the man behind the assassins.
What neither realizes as they begin their flight and their quest is that forces are already at work to bring them both to a mysterious gathering that will change their lives forever—or end them on the spot.
To survive, they must fight through an unforgiving world of assassins, ancient myth, and forgotten gods to a mythical land where their fates await.