Robot Mountain (Agents of ISIS, Book 3)

By sheer accident, the Imperial Special Investigation Service stumbled across a fiendish plot against the Empire--using a time bomb to blow up the tsaritsa and throw the galaxy into chaos.Now, to learn the truth, its agents must infiltrate a hollow mountain, the lair of a mad robotic genius, while simultaneously protecting her majesty from a hidden assassin. And somewhere, a time bomb is ticking.