Literature with POSITIVE view on drugs (the argument from freedom)

I would suggest those who are interested in reading something about drugs to try Thomas De Quincey's Confession of an English Opium Eater, which is one of the most fascinating books I've ever read. The author wrote about his own experience in eating opium, the dreams he made during the time he ate it, and the feelings opium had aroused in him. He also gave a true account of his love for a girl, whom he missed throughout his life. I was captivated by the book when I almost graduated from college, and that left a deep impression upon me.