This allegorical novel follows the spiritual journey of an Indian man called Siddhartha (which means "he who has attained his goals") during the time of Buddha (6th century B.C.). Beginning with the main character's departure from his Brahmin home the search for enlightenment takes Siddhartha through a series of changes and realizations.
The book was originally written in German, using simple, powerful and lyrical language. First published in 1922 after Hermann Hesse had spent some time in India, it became quite influential during the 1960s. It's probably one of the greatest stories you will ever read. Its language is simple yet thought-provokingly profound. Read it [here]
I have just mailed a copy of the book to Horst Berger on his little island in Tonga as I am sure it'll complement his lifestyle perfectly.