George's dog Timmy sniffs out an adventure when he spots some suspicious-looking passengers on a train. He is very interested in one of them, but what has he spotted?

Can the Famous Five solve this mystery?

In addition to the 21 novels in the Famous Five series, Enid Blyton wrote a clutch of short stories based on the characters. These were published in magazines and were collected in the Famous Five Short Story Collection (Hodder).
For the first time, the complete text of Five and a Half-Term Adventure appears in an individual volume, illustrated in full colour.