Siddhartha by Hermann Hesse

Siddhartha is a novel by Hermann Hesse that deals with the spiritual journey of self-discovery of an Indian man named Siddhartha during the time of the Buddha.
The story Siddhartha takes place in ancient India around the time of Gotama Buddha (likely between the fourth and seventh centuries BCE). Siddhartha, the son of a Brahmin, decides to leave behind his home in the hopes of gaining spiritual illumination by becoming an ascetic wandering beggar of the Samanas. Joined by his best friend Govinda, Siddhartha fasts, becomes homeless, renounces all personal possessions, and intensely meditates, eventually seeking and personally speaking with Gotama, the famous Buddha, or Enlightened One. Afterward, both Siddhartha and Govinda acknowledge the elegance of the Buddha's teachings. Although Govinda hastily joins the Buddha's order, Siddhartha does not follow, claiming that the Buddha's philosophy, however supremely wise, does not account for the necessarily distinct experiences of each person. He argues that the individual seeks an absolutely unique and personal meaning that cannot be presented to him by a teacher; he thus resolves to carry on his quest alone.
Siddhartha crosses a river and the generous ferryman, who Siddhartha is unable to pay, merrily predicts that Siddhartha will return to the river later to compensate him in some way. Venturing onward toward city life, Siddhartha discovers Kamala, the most beautiful woman he has yet seen. Kamala, a courtesan of affluent men, notes Siddhartha's handsome appearance and fast wit, telling him that he must become wealthy to win her affections so that she may teach him the art of love. (Summary by Wikipedia)