The Tree: A Jungian Journey: Tales in Psycho-Mythology by J Marvin Spiegelman, a 1982 paperback from Falcon Press, is part of the collection at the Reading Room.

“Henry Miller, the author of Tropic of Cancer and numerous other works of major stature, states:
‘For me it was like sailing down a stream whose shores and everything bordering them was as familiar to me as if I had dreamt it a thousand times. I say familiar, but not stale. Rather like encountering in your sleep old dreams which you knew by heart but had not dreamt for many and many a year. Therefore extremely vivid and exciting. Or I could put it another way and say it was like presenting the quintessence of all one’s spiritual experiences.’
Israel Regardie, the Western World’s foremost authority on occultism and magic, states:
‘Here is the whole Jungian corpus in a nutshell, spelled out brilliantly in the form of original stories, fables, myths and parables. Each is beautifully written, intriguing, commanding one’s full attention. Spiegelman is highly imaginative, a truly creative psychologist.
He deals symbolically with the process of individuation, the growth to be oneself, the movement Godward. As such, it is the story of the Great Work, the noblest story and Work of them all, told with simplicity and deep sincerity.'” — back cover