Stranglers' Moon
Stephen Goldin
 Jules and Yvette D'Alembert are a brother and sister team of aerialists in the D'Alembert family Circus of the Empire. But they are also legendary agents "Wombat" and "Periwinkle" in SOTE, "The Service of The Empire", the imperial intelligence agency, sent to investigate the disappearance of a planetary economist and his wife on a moon devoted to recreation: seemingly a vacationers' paradise... The plot is based in part on Thuggee.