Smith, E.E. Doc, Imperial Book 1, Family d'Alembert Series

Gone from the galaxy... A startling discovery has shaken Earth's galactic Empire: more than two hundred and fifty thousand people have vanished from the resort moon, Vesa, without a trace! Called to duty, SOTE's most daring secret agents, Jules and Yvette D'Alembert - the former aerialists from the triple-gravity planet Des Plaines, possessed of lightning-reflexes and super-strength - are faced with a lethal and baffling conspiracy. Together the D'Alemberts have conquered many of the Empire's most dangerous foes, but now the mighty pair must divide forces - each to challenge a deadly evil terror alone!

TREASON THREATENS THE GALAXY A robber captured in far-off Kolokov knows a secret that threatens the stability of the succession of the Throne of the Empire of Earth. But he withstands the powers of the fatal truth-telling drug nitrobarb and dies before revealing the traitors' names. Daring secret agents Jules and Yvette d'Alembert, possessed of lightning reflexes and super-strength, are faced with a far-reaching and baffling plot. They join forces with the rest of the d'Alemberts to uncover the "time bomb" that menaces the Princess' life and the control of the Galaxy's most populated sector, Earth!

THIEVE'S PARADISE First, the good news: All the top crooks in the whole sector of the galactic Empire of Earth are vanishing, one by one. Now, the bad news: They're all cropping up again on one small planet. What's going on? That's for archvillain Garst to know and superagents Jules and Yvette d'Alembert to find out. And find out they do, with the aid of the superhuman strength they developed on their native planet, the triple-gravity DesPlaines. Now it's just a question of getting out alive—with their boss' daughter in tow!

Vintage paperback

1980, mass market paperback reprint edition, Berkley, NY. Mass market paperback title, 184 pages. Interesting science fiction. The planet Purity consists of a group of religious crackpots. We are talking a lot of suffering. They, unfortunately decide to build an illegal army. Their save the rest of the galaxy. Only problem? The rest of the galaxy doesn't want to be saved.

Jules and Yvette d'Alembert investigate the disappearance from a prison planet of deadly criminals, who are thought to be involved in a plot to prevent the coronation of the Empress of Earth

Jules and Yvette d'Alembert must discover who is using doubles of themselves to lure other agents to their death

The d'Alemberts, a family of spies, thieves, and revolutionaries working for Empress Stanley Nine of the Empire of the Earth, learn that their planet Omicron has been conquered by aliens and they team up with treacherous Lady A to stop them

After the destruction of most of the conspiracy's fleet, including the ship carrying the evil Lady A, the family D'Alembert uncovers a plot on the planet Newforest, proving that the conspiracy led by the mysterious C was greater than they had supposed