The rest of Psychonaut deals with techniques like sigilization, invoking and evoking, god forms, and astral projection...among a great deal else. There is a lot crammed into this deceptively simple little work. Along the way Bluefluke offers a new way of looking at traditional consciousness mapping like chakras or the Qabbalistic sephiroth, looking at these as evolutionary stages of brain development in a new eightfold system partially inspired by Timothy Leary and Robert Anton Wilson.
This is a beginner friendly system, but also a refresher course for those who are old hands at all of this. Like most chaos magic is it stripped entirely of "religious" elements, pared down to simple techniques and workable exercises. It's a manual you are going to want to actually use to understand.
As with Bluefluke's artwork, the writing style is refreshing. It is playful while taking itself serious, irreverent while speaking reverently, and relentlessly modern while teaching tricks used since before the mammoths went extinct. The Psychonaut Field Manual will entertain you, challenge you, and delight you. What more could one want in a grimoire.
And while you are there, do check out Bluefluke's Tarot Trumps. I might prefer the Thelemic re-alignment of the Thoth deck better, but there are some fresh, powerful images there.