Just who is the happiest man in the world and what does it mean to be happy? Mouse lives in a house all alone - and that's the way she likes it. Until one day a miserable old man moves in and turns mouse's life upside-down. As mouse makes moves to cheer up the old man, she slowly learns what it is to be happy and discovers the true identity of her visitor.
- ISBN10 0340931558
- ISBN13 9780340931554
- Publish Date 15 October 2009 (first published 16 October 2008)
- Publish Status Out of Print
- Out of Print 7 May 2016
- Publish Country GB
- Publisher Hachette Children's Group
- Imprint Hodder Children's Books
- Format Paperback
- Pages 32
- Language English