The Kabbalah Unveiled (Containing the Following Books of the Zohar: The Book of Concealed Mystery; the Greater Holy Assembly; the Lesser Holy Assembly)
From title page: "Translated into English from the Latin version of Knorr von Rosenroth, and collated with the original Chaldee and Hebrew text by S.L. MacGregor Mathers".
An authoritative text, first published in 1887, on the subject of the kabbalah. Interesting preface by the author's wife at the time of this "new edition" (1926).