Outlander Leander Series by Eisah, Laurie Laliberte

Leander is an energetic young man who wants to become a treasure hunter. When his dad is deployed he sees it as an opportunity to go on his first adventure; which unfortunately leads him straight into enemy territory. All ambition and no skill or experience, he stumbles his way around enemy camps to find the famous relic the Wind Queen left behind.

Frustrated by the work Ellora has been giving him, Leander is ready to quit when she reveals she knows exactly where the stolen necklace of the late king is. Unfortunately, it's in the hands of black marketers, and Leander quickly learns how violent they can get. A precarious situation forces him to continue pursuing them as he tries to evade both murderers and soldiers.