A series of Study Books was produced in the 1990s for use as concentrated study material on a particular topic at the four-day dialogue weekends held in Ojai, California. Editors utilized the CD-ROM to compile an extensive collection of excerpts for each theme-which range from one sentence in length to an entire talk-and they have organized them into chapters of subsidiary topics. These books are an invaluable resource of excerpted material as they offer a sustained survey of each subject, allowing for a deeper comprehension of what Krishnamurti was conveying. Much of the material has been drawn from the Collected Works of J. Krishnamurti, Vols. I-XVII, the record of Krishnamurti's public talks from 1933 to 1967.