Getting It: The Psychology of est, a non-fiction book by American clinical psychologist Sheridan Fenwick first published in 1976, analyzes Werner Erhard's Erhard Seminars Training or est. Fenwick based the book on her own experience of attending a four-day session of the est training, an intensive 60-hour personal-development course in the self-help genre. Large groups of up to 250 people took the est training at one time.