A lot has been written about the playful (or demonic) Ouija board, everything from it being a game to it being a tool of Satan, and connecting the topic with the always-provocative name of Aleister Crowley promised titillation but not necessarily much more. This book, though, truly delivers the good; it is unexpectedly excellent throughout.
Cornelius is a student of Thelemic magic, is quite familiar with both Crowley and ritual magic, and writes clearly and well. The book delves first into the known history of the Ouija board and its commercial development, as well as 'talking board' vehicles and similar machines, going back to ancient oracles, in examining just what it is that makes it 'work.' The almost accidental triangular design of the pointer, other working planchettes, and so on, are all examined; what makes the board a convenient doorway to other/astral worlds is fully explored. Further, Cornelius takes some time to cover the types of elementals and other entities one might potentially make contact with - or, in the case of the Ouija board, might make contact with the user - and speculates on how to best and most safely deal with them.
Cornelius takes very seriously the potential for harm and dangerous interaction to take place through the medium of the Ouija board. From Crowley's point of view, this danger could be minimized through careful ritual protection, and this is where Cornelius gets into magic, from simple banishing rituals (LBRP) to Enochian tablets (opening and closing by watchtower), correct procedures and the thinking behind them. This is meant to make the board's use as controlled and safe as possible. Specific techniques, tasks for each of the participants, and use/function and set up of all furniture and implements are made clear.
This is the best book I have read on how to use and make the most of the Ouija board. It is excellent in conception, information, and execution.