The Book of Case Remedies (1991): The first edition of of this book was published in 1964 and contained the precise remedies proven to keep Scientologists moving up both side of the Bridge (processing and training). This 1991 edition includes additional material as directed by LRH in 1968, including an update of its chart of gradients of case advancement per the modern Grade Chart. Several of the remedies themselves were updated following LRH instructions and three previously unpublished remedies (BK, BL and BM) were added.