A universe centering around the Crystal Singers of Ballybran.
The Crystal Singer trilogy follows Killashandra Ree as she joins the dangerous profession of cutting rare musical crystals on Ballybran. Begin with Crystal Singer, then continue with Killashandra and Crystal Line. Publication order gives the intended introduction to the planet, its occupational hazards and the changing stakes of Killashandra’s work. The separate story The Coelura is not part of this trilogy sequence.