How do you know you really exist?It's Maisie's birthday and she can't wait to open her presents. She's hoping for the things she needs to build her own nuclear reactor. But she wakes to an empty house and outside the front door is nothing but a terrifying, all-consuming blackness. Trapped in an ever-shifting reality, Maisie knows that she will have to use the laws of the universe and the love of her family to survive. And even that might not be enough...A mind-bending mystery for anyone who's ever asked questions. From the author of The Many Worlds of Albie Bright and The Jamie Drake Equation.Cover illustration by Matt Saunders.

*Over 140 million copies sold worldwide *Good for reluctant readers due to illustrative typeset *Educational edge as books contain facts about various places *Activity packs available to accompany certain titles*More fun and games online at www.geronimostilton.com/UK

Wanneer die Ridderbus deur die donker bars en skreeuend voor hom tot stilstand kom, is dit vir Harry Potter die begin van nog ’n ongewone jaar op Hogwarts. Sirius Black, ’n berugte moordenaar en volgeling van Heer Voldemort, het uit Azkaban ontsnap – en hulle sê hy is op Harry se spoor. Boonop sien professor Trelawney ’n aaklige voorbode oor die dood in Harry se teeblare . . . Maar miskien is die vreesaanjaendste ding van alles die Dementors wat die skoolgronde patrolleer . . .

Three families, two worlds and one magical portal. No one comes to the second world on purpose. The portal between worlds only opens when least expected. But the Raft King is determined to change that. He needs Pip, a boy with an amazing gift. Pip's is just the first of three tales, linking the twins Venus and Swimmer, captured from a slave ship in the first world, and Thanh and his sister Sang, from a later time, escaping postwar Vietnam. What connects these three sets of siblings is the adventure of a lifetime, some helpful sea monsters and a very special crack in the sea.