Penumbra

From Author Wars - https://authorwars.com/publications/penumbra-975246.html

Overview:

Title: Penumbra
Author: Garon Whited
Year: 2023
Publisher:
Price: $2.99
Binding: ebook
Type: Novel
Title Reference: Penumbra
Notes: Amazon Kindle's page count 1327. Data from Amazon.com as of 2023-10-18. The copyright page says "ISBN: 9602876000019". Since ISBNs start with either "978" or "979", this cannot be a invalid ISBN. It's not clear whether it's a data entry error or a different type of identifier mistaken for an ISBN.