"Lauren Ipsum captures the spirit of problem-solving and ignites readers' imaginations. Through a thoughtful, young heroine, it introduces girls and boys to computer science-and to a new way of thinking and problem solving." -Sheryl Sandberg, Facebook COO Lauren Ipsum introduces kids to computer science through a whimsical story that never once mentions computers. Readers follow Laurie, a clever girl lost in Userland, as she uses logic and problem solving skills to find her way home. Without realizing it, kids learn about many computer science concepts, including timing attacks, algorithm design, and common programming problems like the traveling salesman. This full-color edition features brand-new illustrations and expanded, kid-friendly explanations that connect real-world computer science to the metaphors in the book. Lauren Ipsum helps kids develop the critical thinking and problem-solving skills used in working with computers, in an entertaining, non-threatening way.