Unusual requests are commonplace at the No. 1 Ladies' Detective Agency, but so are very ordinary ones, such as a plea for money: when a distant cousin calls on Mma Ramotswe to ask for help with another relative's hip operation, tricky questions arise in regard to family responsibility. Mma Makutsi and Mr J. L. B Matekoni are far from convinced of the merits of the request, but it is hard for Mma Ramotswe, with a heart her size, to turn people away.

Wayward daughters. Missing Husbands. Philandering partners. Curious conmen. If you've got a problem, and no one else can help you, then pay a visit to Precious Ramotswe, Botswana's only - and finest - female private detective. Her methods may not be conventional, and her manner not exactly Miss Marple, but she's got warmth, wit and canny intuition on her side, not to mention Mr J.L.B. Maketoni, the charming proprietor of Tlokweng Road Speedy Motors.

When writer Paul Stewart heads to the idyllic Italian town of Montalcino to finish his already late book, it seems like the perfect escape from stressful city life. Upon landing, however, things quickly take a turn for the worse when he discovers his hired car is nowhere to be found. With no record of any reservation and no other cars available, it looks like Paul is stuck at the airport. That is, until an enterprising stranger offers him an unexpected alternative.

The story revolves around the comings and goings at No. 44 Scotland Street, a fictitious building in a real street in Edinburgh. Immediately recognisable are the Edinburgh chartered surveyor, stalwart of the Conservative Association, who dreams of membership of Scotland's most exclusive golf club. We have the pushy Stockbridge mother, and her prodigiously talented five-year-old son, who is making good progress with the saxophone and with his Italian.

Amateur sleuth Isabel Dalhousie is a philosopher who uses her training to solve unusual mysteries. She edits the Review of Applied Ethics, addressing such questions as "Truth telling in sexual relationships", and she also hosts The Sunday Philosophy Club at her house in Edinburgh. Behind the city's Georgian facades, its moral compasses are spinning with greed, dishonesty, and murderous intent.