Return to James Foley's hilarious series about Sally Tinker, the world's foremost inventor under the age of twelve - now in colour!

Sally Tinker is facing an extraordinary new adventure. The brainenhancing nanobots she is testing have been accidentally swallowed by her baby brother, Joe.

The only way to stop Joe from turning into a superbaby and wreaking super havoc is to shrink herself and travel inside Joe's body on a mission to tackle the problem head-on. What could possibly go wrong? As it turns out, this is only the beginning ...