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From graphic novel superstar (and former computer programming teacher) and New York Times bestselling author Gene Luen Yang, Secret Coders: Potions & Parameters is the sixth and final volume in a wildly entertaining series that combines logic puzzles and basic coding instruction with a page-turning mystery plot!The Coders always knew their programming skills would takethem far, but they never guessed they would take them to another dimension! Orto be accurate, one dimension less -- to save humanity, Hopper, Eni, and Josh musttravel to Flatland, a dangerous two-dimensional world ruled by polygons. Ifthey can return home safely with a turtle of light, they might just stand achance in their final showdown with Dr. One-Zero!