Alexander McCall Smith 
Precious and the Zebra Necklace 

A photograph, a necklace and a missing family . . . A new pupil, Nancy, arrives at Precious Ramotswe's school, and the two girls soon become firm friends. When Precious finds out that all Nancy has to remind her of her missing parents is a photograph and a necklace of beautifully carved zebras, she offers to help find them. This is the start of an exciting adventure that leads the two girls deep into the remotest parts of Botswana, where they meet an old lady who recognises the necklace and has some extraordinary news for Nancy. Find out what it is in the latest book to feature the girl who grew up to become one of the most famous detectives in the world: Precious Ramotswe of the No. 1 Ladies' Detective Agency.