John Norman 
Dancer of Gor 

A shy librarian from Earth learns her true female nature as a slave dancer on the planet Gor in this fantasy series where men dominate women. Doreen Williamson is a quiet, shy librarian on Earth. Like many other young women, she is distrustful of her attractions, frightened of men, introverted in manner and sexually inhibited. She lives within a quiet, lonely, dissatisfying, sheltered, and frustrated desperation, distant from her true self, her nature denied, her only friends books and her secret thoughts. In the realization and enactment of a profound fantasy, after acute self-conflict, she dares to study a form of dance in which she is at last free to move her body as a female, a form of dance in which she may revel in her beauty and womanhood, a form of dance historically commanded by masters of selected, suitable slaves: belly dance. She must then dance, for the first time, before men. In doing so, she discovers her own desirability and that she may be well bid upon.   Rediscover this brilliantly imagined world where men are masters and women live to serve their every desire.  Dancer of Gor is the 22nd book in the Gorean Saga, but you may enjoy reading the series in any order.