The Spheres

From Author Wars - https://authorwars.com/publications/the-spheres-363770.html

Overview:

Title: The Spheres
Author: Iain M. Banks
Year: 2010
Publisher: The Birmingham Science Fiction Group
Pages: 42
Binding: Pamphlet
Type: Collection
Title Reference: The Spheres
Notes: Limited Edition chapbook of 500 numbered copies.
Published to coincide with Iain being Guest of Honour at Novacon 40.
Two pieces: "The Spheres" which was dropped from the original draft of Transition, and "The Secret Courtyard" dropped from the original draft of Matter.
Note that the ads pages (from 40 to 42) are numbered.