The planet Purity was settles by religious crackpots who believed that luxuries like heated buildings were the work of Satan. A three-G rockpile with a nine-month winter, Purity was the ideal place for a life of righteous suffering.
But when the Puritans started building an illegal army for their crusade to "save" the rest of the galaxy -- it was time for the Family d'Alembert to step in. Their blasters were ready to offer the medieval musketeers of Purity some genuine "hell-fire" preaching!
Edward Elmer Smith (also E.E. Smith, E.E. Smith, Ph.D., E.E. “Doc” Smith, Doc Smith, “Skylark” Smith, or—to his family—Ted), was an American food engineer (specializing in doughnut and pastry mixes) and an early science fiction author, best known for the Lensman and Skylark series. He is sometimes called the father of space opera.
This is the sixth in a 10 novel series which was mostly written by Stephen Goldin. Doc Smith wrote a novella called Imperial Stars which Goldin expanded into the first novel, and then Goldin wrote another 9 novels in a long story arc. But Smith is the famous one, so his name appears in large letters everywhere and Goldin is barely mentioned.
The setting is a universe where a Russian Feudal system has somehow become the dominant mode of government and of the language, so we see Russian words sprinkled throughout the conversations. Humanity has spread to a number of planets with varying characteristics. One of these is DesPlaines, a high gravity planet whose inhabitants have adapted by becoming shorter and stockier, and which has developed a unique attraction, The Circus of the Galaxy. What people don't know is that this circus is also a key part of the secret service SOTE, the Service Of The Empire. This allows for an interesting twist for space opera, a series where the heroes do not have secret weapons or super powers, merely acrobatic training.
Purity is a planet settled by fundamentalist religious groups, who seem to compete to see who can suffer the most, and the planet is perfect for suffering being cold and miserable. But now they are creating an army to take their ideas to the rest of the galaxy and purify everyone else. But are they doing this on their own, or is this part of the plot from Lady A.? The book is fast-paced and a good combination of space opera with spy thriller. But since this a 10-novel story arc, each novel builds on what went before, so do not read them out of order.