Imperialistic Council of the Magi: Now Available!
Of all of the odd arcana I've encountered during half a decade editing occult works, this takes the cake for the most odd of all. Invoking none other than Eliphas Levi, it purports to tutor the reader in how to become a magi. Here I insert an opinion; this work is typical of the era (and for a couple decades after) and is more like the Book of Forbidden Knowledge than it is a standard occult philosophy guide, only without some of the bric-a-brac inclusions and advertisements for crystals and self help guides.
That isn't to demean the work however- it's a fun albeit short read, and the various teachings it employs aren't inauthentic in and of themselves and roughly correlate to Theosophy and similar movements from the period. Highly recommended both for lore and laughs!