Police Operation

Police Operation is a science fiction novella by H. Beam Piper, published in 1948. The story follows Verkan Vall, a special assistant to the Paratime Police, as he embarks on a mission to capture a rogue extraterrestrial creature, a Venusian nighthound, that has escaped to Earth and threatens livestock. This narrative explores themes of parallel universes and the consequences of human interference in alternate realities, all within a police procedural framework.