Codex

From Author Wars - https://authorwars.com/books/codex-2239809.html

Overview:

Title: Codex
Author: Lev Grossman
Year: 2004
Type: Novels

Editions/Publications:

2004 . Codex (2004, Lev Grossman, Harcourt, ISBN-10: 0151010668, $24.00, 348 pages, Hardcover, Novel)
2011 . Codex (2011, Lev Grossman, Arrow Books, ISBN-10: 9781446474129, £2.99, ebook, Novel)