Devouring of Time (The Supernatural Activities Division Book 7) by William Stacey

The action is non-stop. When a facility that holds an anomaly that the US government has been hiding and securing is attacked, one of the guardians questions where they should allow the anomaly to be set free. It is called the Devourer of Time, but its very imprisonment is destroying the island it sits on. Wyatt and Chloe are called in to use their mage powers to ensure the containment is secure. But the guardian attacks and breaks the shackles that hold the entity from its prison. Battered and broken, Wyatt must channel his new aquatic powers to prevent disaster.

Stacey once again delivers a wild ride of military and sorcery action that is ever developing. This is a fantastic series.