Treacherous Sand. Legends & Predators, #0.5

A killing and a murder are not one and the same. Murder among Vikings involves concealing one's actions, leaving them untrustworthy. The Viking King of Sandire has always had high expectations of his children, Annora, Riker, and Keyon. All but Keyon are expected to be great leaders of the realm. Keyon has been the gentler of the three, and therefore, a failure in their father's eyes. But after Keyon discovers the truth behind his family history, he's done casting aside his true power.
When Riker notices a change in his twin brother, he fails to pick up the shift of power in the realm until it's too late. Preceding the events of Forbidden Captive (Legends & Predators #1), Treacherous Sand explores the devastating death of Annora and how Riker, the Viking Prince of Sandire, came to be viewed as a traitor by his very realm.