A summarised vesion of Ihya-ul-Aloom (Revival of Religious Sciences) by Imam Al-Ghazali. The perfect book to start with if you want to explore yourself and then read Ihya to understand it better. Alchemy of Happiness takes you from the simple day-to-day acts like eating, drinking, meeting people, and listening music, to moderate ones like marriage, jobs/business to the more complex issues like love, meaning of life and death, spirit (with subtlenes), Maarifat (knowing God). And with a pace and authenticity that comes from an extensive knowledge, exploration, experimenting and belief.
A must read for every human being (not only muslims) if you want to see the strange side of universe and your existance. Tries to break the absoluteness of money, power hunger, Lust of sex (and even eating too much), proudness, hypocracy etc. This means that Imam Ghazali relates our every day acts to the rise and fall of our spiritual effectiveness and our spiritual place before God. Brilliant to say the least. A MUST READ even if you don't want to read a single book in your life. (I've started reading it for the third time since I've got it without a day's break).