Triple Junction - The Schattenreich, #5

Only two weeks remain until Caitlin and Hagen's celebratory wedding. Afterwards, the von der Lahns must vanquish the ancestral family curse before Caitlin gives birth and Cathubodua, the Dark Queen, extracts her final revenge. Dire circumstance prevents Caitlin and the men she loves from channeling their combined shadowcraft into a desperate search for a cure: Dagmar Abel has vanished. As well as Caitlin's twin, Kilhian ar C'hoed, sought for murder by the police.
Düsseldorf Hauptkommissar Rehfurt would like nothing more than to prove that Caitlin and her brother engineered the disappearance of her deadly enemy. And to convict them of murder. Once the legal machinery cranks up, the von der Lahns have no choice but to see it through. Caitlin retains a thread of hope that an Iron Age inscription can remedy the curse. But Ankou, Lord of the Dead, has no intention of letting her slip through his powerful grasp.