Book IV of Family d'Alembert. When Helena, daughter and second in command to the Head of the Empire of Earth's security forces disappears - the future safety of the entire galactic network is threatened. Especially the lives of SOTE's two most highly trained operators, Jules and Yvette d'Alembert. For Helena was one of the very few who knew their real identities and who understood the vital significance of the d'Alembert Circus as SOTE's ultimate weapon for dealing with treason. So Jules and Yvette are sent on a top priority mission - to save Helena and save SOTE from destruction. Cover art by Angus McKie.