Sefer Raziel HaMalakh contains something truly unusual for a mystical text—an alternative alphabet. Several of them, in fact. These are not the standard 22 Hebrew letters but special scripts used exclusively for writing angelic names, divine names, and amulet inscriptions. The most famous is the Ketav Malachim (כתב מלאכים), the "Writing of the Angels."
The Ketav Malachim consists of 22 characters that correspond one-to-one with the Hebrew letters but look entirely different—angular, geometric forms that bear no resemblance to the familiar Ashuri (Assyrian) square script used in Torah scrolls. A second script in the text, Ketav Einayim (כתב עיניים), the "Writing of Eyes," features characters made up of circles and dots, resembling eyes staring from the page. A third script appears without a clear name and is sometimes called the "Passing the River" script or Ketav Avar Nahar.
The purpose of these alternative alphabets was both practical and mystical. On the practical side, writing amulets and divine names in a script that most people could not read added a layer of secrecy. Only initiated practitioners could decode what was written on a given amulet—protecting the divine names from casual misuse. On the mystical side, the text implies that these scripts are not human inventions but angelic writing systems—the actual alphabets used by angels in heaven.
This idea has deep roots in Jewish tradition. The Talmud (Sanhedrin 21b-22a) discusses the history of Hebrew scripts, noting that the original script given to Moses at Sinai may have differed from the square Ashuri script adopted later. Eleazar of Worms, the 13th-century Ashkenazi pietist often credited with compiling Sefer Raziel, was himself deeply interested in cryptographic systems and letter mysticism, a hallmark of the Hasidei Ashkenaz movement.
The angel alphabets of Sefer Raziel influenced later kabbalistic practice throughout the medieval period and were reproduced in numerous manuscripts across Europe and the Middle East.