This project was directed by Henry Alsberg and employed 6,686 writers at its peak in 1936. By January 1939, more than 275 major books and booklets had been published by the FWP. Most famously, the FWP created the American Guide Series, which produced thorough guidebooks for every state that include descriptions of towns, waterways, historic sites, oral histories, photographs, and artwork. An association or group that put up the cost of publication sponsored each book, the cost was anywhere from $5,000 to $10,000. In almost all cases, the book sales were able to reimburse their sponsors. Additionally, another important part of this project was to record oral histories to create archives such as the Slave Narratives and collections of folklore. These writers also participated in research and editorial services to other government agencies.