A Regina J. Woody book that I recently found is called Student Dancer published in 1951. It includes famous dance personalities (Lucia Chase, Katherine Dunham, Martha Graham, Doris Humphrey, Sally Kamin, Igor Youskevitch, Nora Kaye, Walter Terry and others) into the novel.
Other ballet fiction novels that may be found in paperback at used bookstores are Ballet! by Tom Murphy (1978), Save the Last Dance for Me by Judi Miller (1981), and Encore by Monique Raphel High (1981).
One paperback that I thoroughly enjoyed is Six Curtains for Stroganova (1986), originally published in 1946 as Six Curtains for Natasha. Authors are Caryl Brahms and S.J.Simon. This was a series and I have been unable to find the companions: A Bullet in the Ballet and Murder a la Stroganoff (British title: Casino for Sale).
And for those who can read French: L'Amour au Miroir (1983) by Ludmila Tcherina.