Eduardo Penna, writing on RPGnet, wrote of Kabbalah: Mythic Judaism:
One of the best sourcebooks released by Atlas games for their Ars Magica 4th Edition game, Kabbalah isn't just a manual on Jewish magic in Mythic Europe, it's a complete guide for Jewish culture in 13th century Europe.
This book is an essential gaming resource to anyone interested in the mysteries of the Kabbalah. Although it's obvious that Ars Magica players will enjoy it more, any dedicated GM can use the background info.
Justin Mohareb, also writing on RPGnet has some glowing things to say as well:
I don't suppose we need an RPG sourcebook to tell us that it's tough to be Jewish. A cursory glance at the history of the Jews is pretty much all the proof of that you need. Kabbalah: Mythic Judaism, a sourcebook for Ars Magica, gives examples of some of the hardships that Jews have suffered through the ages. But it also gives us a look at the joy of the medieval Jewish life, and the power...Kabbalist Rabbis possessed.
A sourcebook like this is obviously a very...unusual undertaking. It would be very easy to go very wrong with something as sensitive as a real-world religion. The authors seem to be the right men for this job
The book is wonderfully detailed and very informative, giving players & GM's an opportunity to bring a new flavour of magician into their games.
The book has a rather large hurdle to overcome. Most people, gamers included, don't know a hell of a lot about religions and lifestyles outside their own. How, then, can they be expected to role-play a medieval Rabbi?
Kabbalah tries to overcome this difficulty by presenting to the readers a quick section on life as a Jew in the Middle Ages. The Gentiles among us are given an introduction to the Jewish lifestyle, describing what the Jews believe, the situation Jews find themselves in in medieval times, how they live, and the major branches of Judaism.
We're given a Cole's Notes version of the Sefirot, which are the ten aspects of the divine, and are located on the branches of the Tree of Life, and a quickie intro to Gematria, which is the art of divining meaning from a text by examining its letters.
Of course, this is all well and good, but let's be honest: We want Golems, right? The authors don't disappoint. The book gives full game rules for using Kabbalist magi as PC's. There's a template for creating PC's and rules for Purity, an attribute that shows how spiritually perfect the Rabbi is. And, yes, there's Golem creation rules as well as rules for Merkavah, the summoning and control of supernatural creatures, from fairies to angels (and...The other guys).
The book meets the high standards we've come to expect from Atlas Games, and opens up a brand new section of the Mythic middle ages.