Until the publication of Case's "The Tarot", most English-speaking occultists had never heard of Case's Cube of Space concept, nor any alleged correspondences between tarot and the Tree of Life diagram, though the latter correspondence have become common in modern times (e.g., many tarot decks feature a Tree of Life diagram on the jacket of the Fool). Until the mid-1990s, there were almost no other books in print which even mentioned the Cube of Space. The ones that do (sometimes in different terms such as "the Qabalistic Cube") defer to Case's writings on the subject.