Meet Frankie Finkleton. Age 11 and one-twelfth, Frankie has a BIG secret! Well, lots of secrets, actually: 1. She has a brother called Fred who is the Best Invention Ever, and a baby sister called Flo who is her arch-nemesis. 2. She has a dog named Blue who has giant eyeballs and tiny nostrils. 3. Oh ... And she's a teensy-weensy, squinchy bit magic! Frankie has a world inside her head called Thoughtopolis - you just go through the eyeball, right at the skull, past the brain stuff, and then second door on the right! It's great fun, full of weird-and-wonderful places and creatures, and together, she, Fred and Blue go on adventures. Until one day, Frankie gets trapped, and has to uncover a secret hidden deep within if she is to get back to the Real World. But when the truth changes everything, will Frankie want to go back? Help!