Book: Liber 265 by Aleister Crowley
The Structure of the Mind. A Treatise of physology from the mystic and magical standpoint. It's study will help the aspirant to make a detailed scientific Analysis of his mind, and so learn to control it. Likely not written as a document separate From Crowley's diaries. (See p753 of Magick: Liber ABA)Books in PDF format to read:
Aleister Crowley - Liber 077 OzAleister Crowley - Liber 555 Had
Aleister Crowley - Liber 031
Frater Achad - Liber 31