“How To Train Your Dragon” by Tom Whalen Posted on April 12, 2018 by admin Mad Duck Posters now has “How To Train Your Dragon” by Tom Whalen available. On sale now HERE. “How To Train Your Dragon” by Tom Whalen. 36″ x 24″ Screenprint. Ed of 250 N. $65 “How To Train Your Dragon” by Tom Whalen. 36″ x 24″ Screenprint. Ed of 150 N. $85 (variant)