Gideon the Ninth

From Author Wars - https://authorwars.com/publications/gideon-the-ninth-780805.html

Overview:

Title: Gideon the Ninth
Author: Tamsyn Muir
Year: 2020
ISBN-10: 9781250313188
Publisher: Tor.com
Price: $17.99
Pages: 492
Binding: Trade Paperback
Type: Novel
Title Reference: Gideon the Ninth
Notes: Date from Amazon.com as of 2020-06-30. First Edition: September 2019 C$24.50 Tweets from the publisher and the book's editor indicate that this publication includes "15+ pages of new, original content, including a glossary of terms, in-universe writings, and more!" not present in the earlier hardcover and ebook publications.