The Seventh Guard

Running from a warring planet, Xirien and his little sister find themselves on Xanth. A planet that's not too different from their home. yet, just as their settling in, a new threat emerges and Xirien finds himself within the company of the Drathenit Guards, historic people who were once influential guards long long ago.These guards are heroes to the people, but Xirien is smarter to look beyond the surface. Soon enough, a threat emerges putting not just his little sister, but Xanth at risk. Xirien used to run. He's done running, now, he fights.

(Notes, Picture used is not mine.)