This is a collection of three stories that branch from our timeline sometime after the end of World War II. The Geogravitic Power Converter (GPC) has brought cheap, clean, abundant energy and a new physics. The protagonist, Martti Seppanen is a detective, his wife Tuuli is a professional psychic.
These stories read like an early Heinlein. The stories move right a long -- Dalmas seems to be a competent story teller -- but he is undisciplined about the impact of psychic powers. The Martti and Tuuli always seem to have psychic forces looking after them. Dalmas is also undisciplined about the use of POV, breaking into third-person omniscient when he cannot tell the story within Seppanen's POV. The "Puppet Master" in the title is such a shadowy figure, that Seppanen doesn't realize he is a threat for most of the narrative.
Three stars, however, because one scene where a hit-man sets up an ambush for Seppanen is both thrilling and memorable.