Gr 1-4 Bubbly redhead Ruby takes readers on a journey through an imaginary world replete with talking penguins, snow leopards, robots, and foxes who unwittingly teach her basic coding concepts. When Ruby's father travels out of town, he leaves her with a challenge: to find five gems. Armed with four scraps of paper, she uses her analytic skills to draw a map of the imaginary world where the gems are hidden, and children follow Ruby as she looks for them. The hunt for each gem involves a loose tie-in to a host of coding concepts, such as sequencing, patterns, loops, and pattern recognition. Notably, though, none of these terms are used in the actual text of the story; instead they are discussed at length in the post-story "Activity Book" section. Colorful and cheerful illustrations offer enticing Easter egg clues to observant readers throughout are in both the story and the "Activity Book." The visuals also serve to pick up the slack left by the somewhat didactic text. The "Activity Book" furthers the learning of conceptual coding ideas but requires patience and concentration that the intended audience may not yet possess. Kids will not necessarily walk away knowing how to write code but may possibly grasp some of the basic concepts. VERDICT This whimsical coding story could be a great resource for mathematical-minded youngsters but might soar over the heads of those less math-inclined. Amy M. Laughlin, Darien Library, CT