Enid Blyton <br/><br/>
The Adventurous Four : Trapped! 

<br/><br/> The Adventurous Four are Tom, twins Pippa and Zoe and their friend Andy who has a sailing boat on which the four love to go exploring. 
<br/><br/><label>ISBN: </label>9781841352107 
<br/><br/><label>Dewey Class. No.: </label>English BLY