Henry Holt and Company

Henry Holt and Company is an American book-publishing company based in New York City. One of the oldest publishers in the United States, it was founded in 1866 by Henry Holt and Frederick Leypoldt. The company publishes in the fields of American and international fiction, biography, history, politics, science, psychology, health, and children's literature. In the U.S., it operates under Macmillan Publishers.

From the Wikipedia article “Henry Holt and Company”, 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.