Isabel Dalhousie thinks often of friends, sometimes of lovers, and on occasion of chocolate. As an Edinburgh philosopher, she is certain of where she stands. She can review a book called In Praise of Sin with panache and conviction, but real life is...well, perhaps a bit more challenging....

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.

Alexander McCall Smith is a storyteller par excellence and the master of the serial novel form. Not content with the runaway success of the 44 Scotland Street novels he has established a second series, Corduroy Mansions, of which The Dog Who Came in from the Cold is the second volume. McCall Smith treats his characters as old friends, dropping in for a chat with them and to see what they’re up to.

Summer in Edinburgh is a season of delicate sunshine and showers, picnics with loved ones in blossoming gardens and genteel celebrations of art and music. But Isabel Dalhousie's peaceful idyll is broken when a single meeting over coffee with fellow philosopher Dr George McLeod brings an irate phone call from his wife, Roz, who implacably accuses Isabel of conducting an affair with her husband.

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.