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!