Blyton , Enid  <br/><br/>
The famous five : five have a mystery to solve  

 - Hodder :   London ;  1942. 
 - 169  p ; 21 cm .  01 
 - 2025-06-03 
<br/><br/><label>ISBN: </label>9780340681251 
<br/><br/><label>Nat. Bib. No.: </label>0011297 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>BLY 
<br/><br/><label>Universal Decimal Class. No.: </label>823