This will stand up very well along side of Karin Anckarsvard's mystery stories for this age group (Madcap Mystery-1962- etc.) and it takes place in Nordvik which teen-aged Tommi finds a very uneventful place to live. She's much more restless than her parents (her mother is a dentist; her father a minister) or her good friend, equable Henrik. However, from the time when her mother repairs the bridgework of an oil king who rewards her with a valuable ring, the story and Tommi's life pick up considerably. Tommi, removing the ring from the baby in the house, puts it in her school jacket, and it disappears. Stalwart Henrik follows one of the boys, whose briefcase is full of ""borrowed"" belongings, while Tommi is followed by an unidentified pursuant and there are other jewels to be discovered. The ring is retrieved in a much simpler fashion... The story has solid interest, so do the youngers, and it has been translated into an easy, natural prose by Annabelle MacMillan.