The Planiverse: Computer Contact with a Two-Dimensional World

From Author Wars - https://authorwars.com/publications/the-planiverse-computer-contact-with-a-two-dimensional-world-444337.html

Overview:

Title: The Planiverse: Computer Contact with a Two-Dimensional World
Author: A. K. Dewdney
Year: 1984
ISBN-10: 0671463632
Publisher: Poseidon Press
Price: $9.95
Pages: 267
Binding: Trade Paperback
Type: Novel
Title Reference: The Planiverse: Computer Contact with a Two-Dimensional World
Notes:
- Publication date from date/FPT code "0384-0950" on back cover.
  Backed up by Catalog of Copyright entry TX0001417500 which puts the date at 1984-03-06.
- "10 9 8 7 6 5 4 3 2 1" on copyright page.
- Hardcover and trade paperback published simultaneously.
- Cover and interior illustrations credited to fictional characters from the book.
  Presumably they are by the author.
- No BLIC.