The Kinshield Legacy — K.C. May

A mysterious stone tablet with five magical gems has sat abandoned in a cave for two hundred years. The kingdom is in ruins, with only warrant knights to keep the peace. But then, the gems in the tablet, one by one, disappear. Warrant knight Gavin Kinshield is a man of many secrets. He's the one deciphering the runes in the tablet. Unless he can find a suitable replacement, he'll be Thendylath's next king. All he really wants is the letter written by his ancestor Ronor Kinshield, champion to King Arek, confessing the truth of how the king perished... a letter he must earn by tracking down a common thief. But when Gavin saves a woman's life, what should have been a simple task draws him face-to-face with his nightmarish past... and the truth of King Arek's demise.