This vintage book, titled "Engagement and Marriage 1913, study number 4, Engagement and Marriage" is a rare find for collectors interested in the topic of sex education. Written by Orrin G. Cocks and published by Association Press, which is part of a series of hardcover vintage books that explores various aspects of sex education. With its special attribute of being numbered and its focus on engagement and marriage, this book is a valuable addition to any collection. The book is written in English and is a must-have for those interested in antiquarian and collectible books. The forward is written by John D. Rockefeller, Jr., and gives us insight into the era around the turn of the century. This book is over 110 years old!