2017 Reprint of 1910 Edition. Al-Ghazzali, or, Al-Ghazali, the author of The Alchemy of Happiness, was a Persian theologian, philosopher, and prolific Sunni Muslim author, and is regarded as one of the great thinkers of Islam. The work emphasized the importance of observing the ritual requirements of Islam, the actions that would lead to salvation, and avoidance of sin. The factor that set the Alchemy apart from other theological works at the time...