Peter R. König's popular and controversial research on the O.T.O. and other oranisations such as Fraternitas Saturni is mainly concerning the history and legitimacy of the OTO, but he is generally known to collect as much information as possible and probably has one of the best archives in the world by now. Having said that, when it comes to interpretation of the data, his work (in my humble opinion) is to be taken with many, many grains of salt. Speculations and conclusions are fuelled by a negative attitude towards the main protégés and particularly towards the Caliphate OTO. But this is without any doubt still a very good source of information that you won't find anywhere else and I believe anybody interested or involved in the OTO is actually well advised to also at least listen to opinions of critics to then make up their own mind rather than blindly believing anything. That, and imho only that, is the thelemic way as opposed to old aeonic faith.