This is book 4 in the international bestselling series "Geronimo Stilton" series for 5+. When my old friend Professor von Volt called to ask for help, I agreed immediately - even though it meant trekking halfway around the world to Mouse Everest! The trip was long and dangerous. I almost froze my tail off along the way. And then I was kidnapped by a yeti! Yes, it was a truly extraordinary adventure ...This title includes full-colour integrated fiction for 5+ from the UK publishers of "Diary of a Wimpy Kid", which rewrote the rules - and the bestseller charts - for young fiction. Incredible interactive website allows you to create your own avatar for New Mouse City! This title includes funny and adventurous stories with colourful, engaging design. It is a huge hit with both avid and reluctant readers.