The Lady Vanishes

A terrifying train journey across Europe...
'Where is the English lady?' asked Iris. 'You are making a mistake,' said the Baroness coldly. 'There is no English lady on the train.'
But Iris Carr has met Miss Froy, spoken to her, had tea with her... and now Miss Froy had vanished.
Iris knew that Miss Froy was in danger. But nobody on the train believed her... And what Iris didn't know was that now they were after her...