The purpose of this collegium is to establish a group, a focal point and a basis for international community for those interested in Mithraism and its history, study, research, revive and practice the Roman Cult of Mithras. Join this collegium here: http://romanrepublic.org/civitas/joint_ ... Mithrae/69
There is no true historical valid guide to Mithraism. There are some books which present some ideas based on some ancient sources - but even these sources are very few. So in the case of Mithraism there is necessary to understand that we can only reconstruct some basic ideas and add to them our interpretation. I can suggest two books which I consider as a good one (but I do not agree with everything what is written in them - for example I practice Roman Mithraism without any connection with Persian Mithra):