Last dance / Hanna Schroy.

Enhanced descriptions from Syndetics:

"A ballet story with a slight surreal twist for dance lovers." -- KIRKUS

"The perfect kind of ballerina drama." -- BOOKLIST

"A sobering fable about the prices that people pay to stay at the top of their art." -- FOREWORD

"For years I've watched ballerinas from this room. I want what you want. I wish to join them."

Miriam has trained her whole life to fulfill her dreams and it's finally paid off now that she's the prima ballerina of the Lulli Dance Company, but she's been keeping a secret from them. The years of sprains, fractures, and bruises have taken their toll and a catastrophic ankle injury now means one terrible thing: she has to give it all up forever. Distraught beyond consolation, Miriam runs from the studio and discovers a secret room she's never seen before. Inside she finds a pair of gleaming white and gold slippers and a mysterious voice whispering to her in the dark. If she tries on the slippers, it says, she'll regain the strength to raise en pointe. It speaks the truth!

Soon, Miriam is back, but each achievement means danger for everyone around her and negotiation with the spirit who claims it wants just one little harmless thing in return . . . to join the ballerinas and dance, just like her.