The Clandestine Circle — Mary H. Herbert

Rose Knight Linsha Majere, working undercover for the Solamnics' Clandestine Circle, earns a place on the elite bodyguard of Hogan Bight, the mysterious lord governor of Sanction. She quickly learns the governor is not the only one who needs protection in a city threatened by an active volcano about to erupt, a death ship filled with an unknown plague, the ever-watchful Legion of Steel, and the subversive Knights of Neraka. But who will protect Linisha from her own heart?