Richard reunites with his friend Roland Childe, believed dead, in Chasm City, only to be recruited into an expedition inside the Blood Spire, an alien tower riddled with escalating, lethal mathematical puzzles. As the team pushes deeper, the price of climbing higher turns out to be more than any of them bargained for, in one of Alastair Reynolds's most unsettling stand-alone Revelation Space novellas.

Summary by Loreful, from public sources

Placement