Viking Press

Viking Press (formally Viking Penguin, also listed as Viking Books) is an American publishing company owned by Penguin Random House. It was founded in New York City on March 1, 1925, by Harold K. Guinzburg and George S. Oppenheimer and then acquired by the Penguin Group in 1975. The publisher's name and logo, a Viking ship drawn by Rockwell Kent, were chosen as symbols of enterprise, adventure, and exploration in publishing. Viking Press was sold to Penguin Books in 1975 for $12 million due to the publishing house's monetary difficulties. These were speculated to have been caused by the shrinkage in the juvenile market and Viking Press' lack of a textbook division.

From the Wikipedia article “Viking Press”, licensed under CC BY-SA 4.0.

An imprint is a brand inside a larger publishing house, often with its own editors and list. Imprints of large groups usually acquire through literary agents; read recent titles to see whether your book fits the list, then target agents who sell to it.