Valley of the Trolls

From Author Wars - https://authorwars.com/books/valley-of-the-trolls-2642533.html

Overview:

Title: Valley of the Trolls
Author: Chris Riddell
Year: 2006
Type: Interior Art

Editions/Publications:

Unknown. The Da Vinci Cod and Other Illustrations for Unwritten Books (Unknown, Chris Riddell, Candlewick Press, ISBN-10: 0763630535, $7.99, 71+[1] pages, Hardcover, Non-fiction)