Fourteen-year-old Everett Singh is the only witness to his father's kidnapping off the dark streets of London. His dad, a scientist whose area of expertise is the multiverse theory, disappears without a trace, and the authorities seem strangely unmotivated to pursue the investigation. His father did leave one very important thing behind, the Infundibulum, which is basically an iPad app that allows the holder to unravel a map of the multiverse. Everett, the brilliant mathematics protegee, sets out on a multi-dimensional quest to rescue his father.
Planesrunner, the first book in the Everness series by Ian McDonald, is a
fast-paced, fun adventure story that I personally cannot wait to share with my 9th grade students.