"Aiwass The name of a spirit with which the magician Crowley made contact in 1904 while staying in Ceylon."
You know right off the bat where this dictionary is going - downhill all the way. I will not debate the essence of the sentence, but I must point out that there is a great geological difference between Ceylon and Cairo, Egypt, where Crowley first contacted his Holy Guardian Angel or True Self.
Remember the rule of thumb: if the writer cannot accurately give well known and easily verifiable information, chances are he is even more inaccurate about the more complex aspects of the subject he is writing upon.
"(28) EVERY MAN HAS THE RIGHT ... WITH HIM. ..." the book continues in another place,
"gives genuine cause for concern. In terms of the esotericism upon which true demonology is based, the dictum 'Do what thou wilt shall be the whole of the Law' is probably quite correct, yet no one can afford to ignore the future consequences which follow an indulging in every impulse of will. Unbridled egotism has always been linked with the ABYSS in hermetic lore. ..."
And Mr. Gettings proved his statement so by impulsively writing this book with unbridled egotism only to fall into the abyss of ignorance, for it is clearly stated by Aleister Crowley in several places that "Do what thou wilt" does not mean do as you please. It is not a licence to satisfy every impulse of the petty ego. Instead it means that one should discover one's True Will, one's specific purpose for existing, God's Will, and do that, very often ignoring not future consequences but ignoring instead the impulsive indulgences of the ego for the sake of a better future for all beings. If Mr. Gettings had actually studied his subject, even lightly, before writing a book on it, he might have written something truly informative and worth reading. And if Trafalgar Square had a conscience, this is one book they would allow to go out of print.