Invader: Imperial Agent (4 in the Invader Novella Series)

In the fourth novella of the INVADER series, set in Roman Britain in AD 44, the Romans' strategy to place a friendly king is jeopardized by rumors of a traitor and a rising enemy beyond the marshes. Junior officer Horatius Figulus must train a new royal bodyguard while navigating a treacherous landscape as a secret Druid sect captures the king. With chaos looming, Figulus is tasked with infiltrating the enemy, rescuing the king, and confronting the Druid leader.