The Alchemist is a minor character who appears in the later part of the book. One may wonder why such a minor character has the book named after him. I think the answer is found in the fact that the work of the alchemist can involve the changing of common metals say lead into gold, this is considered a metaphor for changing the self and becoming a deeper and more meaningful person. So in the person the work of the alchemist is to change the person from common moribund and doomed to exquisite, life giving and eternal. What this book is really about is not adventure and treasure but the adventure of self discovery and the transformation of the self.
This book is a wonderful allegory and is best read with the wide eyed wonder of the child.
I hope you enjoy it.
R