The product is a collection of 7 of 12 including volumes 1, 6, 7, 8, 9 11 and 12. They are hardcover volumes of "Antique Books Society Applied Psychology" by Warren Hilton, printed between 1919 and 1920 in the United States. These books, published by The Society of Applied Psychology, focus on the topic of psychology and fall under the subject of Science & Medicine. Written in English, this rare set provides valuable insights into the history and development of psychology in the early 20th century.