Sefer Raziel HaMalakh is a compilation of Jewish esoteric, magical and cosmological material, most likely assembled in something close to its surviving form during the 13th century, with the German Jewish mystic Eleazar of Worms traditionally associated with the compilation, though the text incorporates considerably older material, including large portions drawn from the earlier Sefer ha-Razim ("Book of Secrets"), a distinct and older Jewish magical text describing the structure of the seven heavens and their angelic hierarchies.
The book's framing legend gives it its name and its extraordinary claimed pedigree: according to tradition, the angel Raziel — whose name means "secret of God" — appeared to Adam after his expulsion from Eden and presented him with a book containing all the secrets of heaven and earth, so that he might find his way back to divine favour. The book was said to pass down through the biblical patriarchs, eventually reaching Noah (who used it to know how to build the ark) and later King Solomon, whose own legendary command over spirits and demons draws on precisely this kind of transmitted angelic knowledge.
The compilation covers a wide range of material: detailed angelology describing the names, ranks and functions of numerous angels; astrological and cosmological information about the heavens and planetary influences; magical seals, amulets and protective formulas for use against illness, the evil eye, and danger in childbirth; and mystical commentary connecting these practical elements back to core Kabbalistic concepts inherited from earlier texts including the Sefer Yetzirah.
Unlike the highly abstract theosophical Kabbalah that would develop through the Zohar and later Lurianic tradition, Sefer Raziel remained intensely practical — a working reference for protection and blessing rather than a purely contemplative or philosophical text, which helps explain its remarkable staying power in everyday Jewish domestic life across many centuries.