These lectures were intended by Ouspensky as introductory material for people interested in the work in England.
This material is still unmatched as a brief statement of the work's psychological ideas.
Designed to be read aloud at weekly meetings of small groups of people interested in the work, they are almost a basic primer of Gurdjieff's psychological ideas on consciousness and spiritual development. They were constantly revised as new groups came into existence and took their final form only after Ouspensky moved from London to New York, where he continued to teach from 1941 to 1947.
The form of the publication is more readable than other editions. Chapter layout, font and page size, make it worth the price. This is a serious study document in book form. Students of the 4th way system understand these lectures as the psychological formulary we are all built on. A lifetime of observation and study needing the form of a publication able to support and stand up to frequent use. I was quite pleased to learn that some awake beings went proactive to improve accessibility.