The Art of Pas de Deux by Nicolai Serrebrenikov & Joan Lawson
Recommended for students of all levels.

Although this book is out of print, Amazon.com may be able to locate a copy for you. Click on the cover and try their inquiry service.

This is an excellent book to help one learn the mechanics of ballet partnering. Of course nothing is better than actual practice, but this collection of promenades, lifts, and partnered turns is an excellent foundation on which to base one's study.

The Shape of Content by Ben Shahn
Recommended especially for college-level students and those already in the field.

Shahn has a lot of great things to say about the creative process, the artist's position in society, and something very important: an artist must have something to say; and once s/he does, how does the idea relate to the way it is expressed.

He speaks about the creative process chiefly in terms of studio arts, but his remarks are pertinent for those in the performing arts as well.

Zen in the Martial Arts by Joe Hyams
Recommended for students of all levels.

So what does this book have to do with wanting to be in dance? Everything!
These short, easy-to-read chapters each contain some lesson on how to approach one's training, how to focus one's life on a goal, how to keep one's head level when the going gets tough. It's no stretch to read this as a guide for focusing your dance career, or perhaps more accurately, your life as a dance professional.