This is the final volume of Kenneth Grant’s Typhonian Trilogies. In order fully to understand its purpose and content, The Ninth Arch should be scanned against the background of the larger canvas on which it is painted. Such an approach will facilitate insight into the Oracles of OKBISh (The Book of the Spider) and their accompanying comments. Oracles were communicated audibly, and occasionally visually, to various members of New Isis Lodge (1955-62) and at certain stages of magical ritual. The Current which generated the material began, sporadically, as early as 1939, with the initial movement of a transmission which developed over the years into the text known as the Wisdom of S’lba. In 1945, the Wisdom – then in its nascent stage – was recognized by Aleister Crowley as an authentic communication. From that time, the Informing Intelligence went on to complete the Wisdom, and proceeded to produce the massive series of Oracles presented in The Ninth Arch. The mode of reception has been described in the Introduction. The method of documentation confirms beyond a doubt the validity of serial qabalah, as used previously in analyses of the Wisdom.