William's little sister, Mary, has lots of annoying habits, but the worst is her invention of an imaginary friend. Not just any old imaginary friend, but a lamb. Now Lamb is stealing William's place on the sofa and eating all his favourite tea-time biscuits. The rest of William's family think Mary's adorable, and humour her, but William is irritated. Now he's invented some imaginary friends.

Only there are six of them. And they're wolves. It looks like Lamb could be in for a shock ...

This book features in the following series: Hodder Storybook, Storybook .

There are 96 pages in this book. This book was published 1999 by Hachette Children's Group .

Paul Stewart is the very funny, very talented author of more than fifteen books for children, including The Edge Chronicles, a collaboration with Chris Riddell. KATHRYN CAVE is the author of a number of successful children's books including Dragon Rise and Something Else (Puffin). She is a book editor in London and has three children.