A thriller for young people set in the Alps, involving car chases, top secret recording, British agents, international crooks, and unwitting heroes on holiday and becoming involved!
Sarah Greenaway Miall (née Leith, 18 December 1918 – 6 October 2010), was a British rally driver and novelist, and a Second World War codebreaker at Bletchley Park. As Sally Bicknell, she published several novels, including The Midwinter Violins (1973), The Summer of the Warehouse (1979), and Follow that Uncle! (1980)
A carefree holiday turns into a sinister guessing game for Guy Gregson and his cousin Tom. An exciting adventure story told with all Sally Bicknell's skill and humour. Books for Keeps, 4 Sept 1980