Further adventures for twins Andy and Mary (A Little Trouble in Amsterdam, Level 2). This time Andy and Mary, are away with their father in the beautiful Yorkshire Dales in the UK. After discovering a locked door in a supposedly abandoned mine, Mary's curiosity is aroused. What is someone hiding in the mine? And who is the man watching them through the binoculars? Cambridge Discovery Readers is an exciting series of original fiction, adapted fiction and factbooks especially written for teenagers. Original illustrations guide students through the story while activities throughout the book consolidate new vocabulary and encourage independent learning. The accompanying website with lesson plans and worksheets for every title, sample chapters and audio clips, provides extra support for both teachers and students. This paperback is in British English. It is also available with Audio CD/CD-ROM that contains vocabulary games and a complete audio recording.