Codex Derynianus

From Author Wars - https://authorwars.com/publications/codex-derynianus-7439.html

Overview:

Title: Codex Derynianus
Author: Katherine Kurtz, Robert Reginald
Year: Unpublished
Publisher: Del Rey / Ballantine
Binding: Trade Paperback
Type: Non-fiction
Title Reference: Codex Derynianus
Notes: This edition doesn't exist: it was contracted and paid for, but never actually published by Ballantine. (from Robert Reginald)