Within the first few pages, I had angels and Ahriman, followed in close succession by the Horned God and Diana and presently the elemental division of sylphs, undines, salamanders, gnomes, and phrases like "etheric matter."

This reminds me of a book my high-school best friend showed me. I remember feeling vaguely offended by the drawings of syplphs because they were sort of elemental-spirit-ish, whereas as a ballet student, I had it in my head that sylphs should look like ballet students in white gauzy costumes.