It happens that I have been reviewing the GUE Cave 1 class materials as they exist in 2014. In addition to Jarrod's book on cave diving, which is a treatise on cave and technical diving, and not a manual, and some materials on gas management and decompression, the materials include 79 pages of supplemental readings. Among them are Erik Baker's "Understanding M Values", a paper by Neal Pollock on deep stops, a paper on VPM, a paper by Pollock on thermal stress, several articles on cardiovascular conditions for divers, and an article on physiologic changes in smokers. I have the cave manuals from NACD and NSS-CDS, from TDI and from NAUI, but I wonder if any other agency includes or requires so much reading of theory for their cave or technical students?