Sufism is often regarded as the mystical branch of Islam, but to Sufis it has always been considered the heart of Islam. In this brief but dense introduction, one of the foremost scholars on Sufism opens up the tradition of the Sufis themselves. While many introductions to Sufism reveal only the "intoxicated" Sufism of paradoxical parables and poets drunken with love for God, Sufism is also balanced by a sober side. William Chittick presents both sides, touching on the major beliefs and practices of Sufis through the ages. What distinguishes Chittick's work is that he draws directly from his vast knowledge of original Sufi writings. He introduces us to Arabic terms, which if merely translated into English would mislead the reader. Instead, he describes the nuances of a few key terms that deliver the reader beyond our usual understanding and into the minds and hearts of Sufi mystics, philosophers, and theologians. Chittick's writing can be difficult, tossing off words like "supererogatory" and "deracinated," but a patient reading will reward you with an understanding of the subtlety and dynamism that Sufism brings to the Islamic tradition. --Brian Bruya